Dynamically scoped programming languages include bash, LaTeX, and the original version of Lisp. Consider code is like below, f2 () { f1 () { } f3 () { f1 () } } Static: If it isn't found, we look up the calling stack for a definition. The scope is static in Python as well as in C++. It's a "what if C had.." type of question. The best answers are voted up and rise to the top, Not the answer you're looking for? 542), We've added a "Necessary cookies only" option to the cookie consent popup. To learn more, see our tips on writing great answers. It isn't standard C terminology, which is one reason why there is confusion. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Accessing to nonlocal variables in lexical scoping is fast. To sum up, in static scoping the compiler first searches in the current block, then in global variables, then in successively smaller scopes.Dynamic Scoping:With dynamic scope, a global identifier refers to the identifier associated with the most recent environment and is uncommon in modern languages. Appendix: Dynamic scoping with static typing. How many submissions can we expect this please guide me, if someone has given interview Hey darshan you are so strong man . The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. From https://en.wikipedia.org/wiki/Name_binding. Static scoping also makes it much easier to make a modular code as programmer can figure out the scope just by looking at the code. scoped. 5 What is the purpose of dynamic scoping? Want to improve this question? 2. enclosing scopes -- are visible unless they are overridden. What is the general problem with static scoping? Readability 2. The value is the data. But note that this mechanism is kind of like dynamic scope. Each time a new function is executed, a new scope is pushed onto the stack.Perl supports both dynamic and static scoping. This answer should be accepted; it does a great job of explaining the difference between lexical and dynamic scope, especially with the addition of the easier to read example program. However, with dynamic scoping, it depends on how x is bound at runtime. Which variable we use in Static Scope? 1 What is the major difference between static and dynamic scoped programming languages? Most programming languages we use today are lexically scoped. STATIC SCOPING by default C is static scoping in this scoping firstly the value which going to be printed is looked in local scope if it is present than the values will be printed if it is not present than the values will searched in STATIA AREA(i,e int a=10,b=2) also when the program will complie the memory will be allocated to static area and these values will remain till the program did not end .here is small example : printf(a,b,t); // here a=10 , b=2 ,t=6 will be printed becoz firstly it try to look within this red scope if it find these values ,than these value will be printed but here it did n't find so it will print the static variables (i,e nt a=10,b=2), printf(a,h); // here a=10 ,h=567 will be printed. https://www.youtube.com/watch?v=6m_RLTfS72c, static scope and dynamic scope with examples, We've added a "Necessary cookies only" option to the cookie consent popup. Ancestor:- In static scoping when we are not getting referred variable in local scope then search it in lower to higher ancestor block. Could very old employee stock options still be accessible and viable? Understanding the difference between these two scoping mechanisms is important for any JavaScript developer, as it can greatly impact the behavior and performance of your code. Please do look at our guidelines. And vice-versa, closures can naturally be implemented in languages with static scope. scoping rule, we first look for a local definition of a variable. I'd guess this is from a compiler / programming languages class, possibly using a subset of C as language for some experiments. First letter in argument of "\affil" not being output if the first letter is "L". Dynamic testing can be done only after the executables are prepared. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? So the scope of a function could mean two things: either the scope defined by the functions body, in which its local variables are declared; or the scope (either a class or a namespace) in which the function name is declared. The difference between static scope and dynamic scope [closed], The open-source game engine youve been waiting for: Godot (Ep. Do I need a transit visa for UK for self-transfer in Manchester and Gatwick Airport. With dynamic scoping, we have a stack of variable definitions tracked at runtime -- so which x we write to depends on what exactly is in scope and has been defined dynamically at runtime. Writes that end up printed at the end of the program are marked with a *: And here it is with dynamic scoping. Static testing is a more cost-effective process. The difference between those languages is related to rules that define start and end of the scope of names. I know this won't make much sense but let me explain this with the help of an example. The scoping that most programmers are used to is called lexical scoping. Runtime state of program stack determines the variable. 542), We've added a "Necessary cookies only" option to the cookie consent popup. What are some tools or methods I can purchase to trace a water leak? When the program is run, this 'c' is first initialized to 3, then the value 3 is overwritten in main() with 4, which is why the output of fun2() is '1 2 4'. In this scoping, a variable always refers to its top-level environment. Using this scoping rule, we first look for a local definition of a variable. Dynamic binding (also known as late binding) can mean a few different things, but in this context it probably refers to whether the storage location for a name is located at compile-time or at runtime. One depends on the (static) location in the source code, the other on the (dynamic) history that got you were you are during runtime. The above code will work in java? In conclusion, static scoping and dynamic scoping are two different ways in which a programming language can determine the value of a variable at runtime. Using this scoping rule, we first look for a local definition of a variable. Learn more about Stack Overflow the company, and our products. By the way: C has static scope rules. fun2 in the way up finds $a=2, b=3$ in fun1 and $c=4$ in main. Find centralized, trusted content and collaborate around the technologies you use most. The dynamic type is a static type, but an object of type dynamic bypasses static type checking. rev2023.3.1.43266. Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Dynamic scoping means that where a variable is declared is determined dynamically by looking up the call stack. name binding is to create a new binding between a name and an entity. Do these refer to the same variable or to different ones? acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Change column name of a given DataFrame in R, Convert Factor to Numeric and Numeric to Factor in R Programming, Adding elements in a vector in R programming - append() method, Clear the Console and the Environment in R Studio. For example, the output for the below program is 10, i.e., the value returned by f() is not dependent on who is calling it (Like g() calls it and has a x with value 20). 115. Can patents be featured/explained in a youtube video i.e. f() always returns the value of global variable x. This type of testing can be performed before the compilation of code. Locality of reasoning. All the scopes shown here are static. It has lexical scope. Here is an example of dynamic scoping in JavaScript: In this example, the variable x is defined within the bar function and is accessible to the foo function, even though foo was not called within the scope of the x variable. Necessary cookies are absolutely essential for the website to function properly. This cookie is set by GDPR Cookie Consent plugin. So when fun2 is invoked, it will follow the static link to the global level and find a=1, b=2 and c=3. (x => x2 is popped when c returns.). With static (lexical) scoping, the structure of the program source code determines what variables you are referring to. A local scope is always defined by the body of a function. In the dynamic picture, the stack at B already has D on top of C and then A. Below is a code of lexical Scoping in R. In this example, first, a mapping for a is created. Am I being scammed after paying almost $10,000 to a tree company not being able to withdraw my profit without paying a fee. In conclusion, static scoping and dynamic scoping are two different ways in which a programming language can determine the value of a variable at runtime. It prints 105+10, i.e. Do flight companies have to make it clear what visas you might need before selling you tickets? Each time a new function is executed, a new scope is pushed onto the stack. Dynamic scoping was used in early dialects of Lisp, and some older interpreted languages such as SNOBOL and APL. Dynamic scoping. Disadvantages: Some loss of flexibility. Less run-time overhead. All three of them will have a static link pointing to the global level. Note the only changes are in B, and in the location of the * tags: Static scoping and Dynamic scoping are different ways to find a particular variable with a specific unique name in a program written in any language. Creating a class within a function and access a function defined in the containing function's scope. In this scoping a variable always refers to its top level environment. Dynamic testing is used to find and fix the defects. This button displays the currently selected search type. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Variables that are defined within a block of code, such as a function, are only accessible within that block of code and any nested blocks. JWT: JWT-claim routing. 1 Static vs. dynamic scoping The scope of a variable is where that variable can be mentioned and used. On line 3, we define a function c, which creates a new mapping for a and then calls b. What is the best way to deprotonate a methyl group? Dynamic testing is a less cost-effective process. And, therefore the type of the object determines which method is going to be executed. Static scope is binding names to non-local variables. One depends on the (static) location in the source code, the other on the (dynamic) history that got you were you are during runtime. Each time a new function is executed, a new scope is pushed onto the stack. What grade do you start looking at colleges? Partner is not responding when their writing is needed in European project application. what is the difference between while (*s++ = *t++) and while (*++s = *++t) ?? Note that D mutates A.y according to both methods of name resolution, whereas B only mutates A.x and A.z if lexical rather than dynamic scoping is chosen. Output in a language that uses Dynamic Scoping : Static Vs Dynamic ScopingIn most programming languages static scoping is dominant. Change Color of Bars in Barchart using ggplot2 in R, Remove rows with NA in one column of R DataFrame, Converting a List to Vector in R Language - unlist() Function. look up the calling stack for a definition. The scope of a variable is where that variable can be mentioned and used. Could very old employee stock options still be accessible and viable? nesting depth/chain offset : the difference between the static depth of the subprogram containing the reference to X and the static depth of the subprogram contining the declaration for X. Find centralized, trusted content and collaborate around the technologies you use most. there's only difference between them like @Jules explained above Why do we kill some animals but not others? Dynamic scoping was used in early dialects of Lisp, and some older interpreted
This was possible because the -calculus uses static scoping (also known as lexical scoping). In simpler terms, in dynamic scoping, the compiler first searches the current block and then successively all the calling functions. These cookies will be stored in your browser only with your consent. Why don't we get infinite energy from a continous emission spectrum? Weapon damage assessment, or What hell have I unleashed? It is meaningless to me in the context of this code, and I'm both a compiler writer and a 30+-year user of C. Either you or he is misusing standard terminology. In Lexical Scoping the scope of the variable is determined by the textual structure of a program. What are differences between Static Scope and Dynamic Scope? Differences between static scope and dynamic scope are clearly defined in this video using example. objects at which locations in the program code (lexically) and in Are there relations between static and dynamic bindings, and static THEN we can say that the output of fun2() should be '1 2 3' under static scoping (as in C) versus '1 2 4' under dynamic scoping. Early Lisps used dynamic scoping for all variables, but that has since been widely regarded as a mistake. Lexical scoping (sometimes known as static scoping ) is a convention used with many programming languages that sets the scope (range of functionality) of a variable so that it may only be called (referenced) from within the block of code in which it is defined. For example: With static or lexical scoping this will print 2. However, you may visit "Cookie Settings" to provide a controlled consent. Is variance swap long volatility of volatility? A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. 3.3. It only takes a minute to sign up. Making statements based on opinion; back them up with references or personal experience. In static scoping, if an area of the program has a certain scope, a variable within a function will return its assigned value for that scope whenever the function runs. Since it's called from fun1 the variable bindings of that scope will be used (thus a = 2 and b = 3). In the next line a function b is defined which returns the value of some a. I added one missing int to variable C, after edit. Dynamic ScopingStatic Scoping:Static scoping is also called lexical scoping. Lexical Scope. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How does a fan in a turbofan engine suck air in? More runtime N.'Meng,'S.'Arthur' overhead 34 Why don't we get infinite energy from a continous emission spectrum? PTIJ Should we be afraid of Artificial Intelligence? Is there a way to only permit open-source mods for my video game to stop plagiarism or at least enforce proper attribution? Launching the CI/CD and R Collectives and community editing features for What are the advantages of dynamic scoping? Does visual basic use static/lexical or dynamic scoping? is there a chinese version of ex. Use MathJax to format equations. In static scoping, a name refers to its closest binding, going from inner to outer scope in the program text ), dynamic scoping is not substantially valuable since memory and scope are more easily handled by ordering. Static scoping and Dynamic scoping are different ways to find a particular variable with a specific unique name in a program written in any language. Note that you need to use lambda expressions to write this code in e.g. Advantages of static scoping: Readability. Each procedure that is invoked contains a link (the dynamic link) to the invoking procedure. I believe Common Lisp supports both static and dynamic scoping, in which case each name is either dynamically or statically scoped. static depth : an integer associated with a static scope that indicates how deeply it is nested in the outermost scope. Creating a Data Frame from Vectors in R Programming, Filter data by multiple conditions in R using Dplyr. At that point there is an x defined, so the value x=3 is used. Static, dynamic, and passive testing. I believe Common Lisp supports both static and dynamic scoping, in which case each name is either dynamically or statically scoped. How to filter R dataframe by multiple conditions? Because fun1 had been called from main, which set up the binding c = 4, the output would be 2 3 4. What is the major difference between static and dynamic scoped programming languages? 105. From my understanding, the result of this program when run using static scoping is: x=13, y=7, and z=2. Scoping is how names are associated with storage locations. This scope is typically stored with the function's call stack. To learn more, see our tips on writing great answers. Good to hear. Later Lisps and most other languages use lexical scoping. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? The eval() function can execute a string of JavaScript code and can be used to change the value of a variable based on the call stack at runtime. Static vs. Here is an example of static scoping in JavaScript: In this example, the variable x is defined outside of the foo function and is accessible from both within and outside of the function. Why don't we get infinite energy from a continous emission spectrum? In static scoping, the places where a variable can be used are determined by the lexical structure of the program. With dynamic scope traverses up the chain of scopes until it finds variable it needs, which reflects the fact that scopes are: What is the advantage of static scoping over dynamic scoping? This leaves x1 untouched, and so we print 1 at the end of the program. If it isn't found, we look up the calling stack for a definition. Why was the nose gear of Concorde located so far aft? Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? Perl language allows dynamic scoping. A Computer Science portal for geeks. 'this' in arrow function not showing lexical scoping, Dynamic/Static scope with Deep/Shallow binding (exercises), procedural language understanding - static vs dynamic scoping, Does bash use dynamic or static scope when calling a script within another script. Connect and share knowledge within a single location that is structured and easy to search. Thanks for contributing an answer to Stack Overflow! So Python has static scoping after all. And how can that possibly affect the output of the code. Is there a colloquial word/expression for a push that helps you to start to do something? dynamic scoping gives preference to local variables(previous function ) only when the current scope does not have any variable so it go to previoys block of scope ,take the value and print it.. What is the difference between static scoping and dynamic scoping? What is the difference between name binding and scoping? What is a dynamically scoped language? What is the difference between "let" and "var"? An identifier may have restricted scope. Static scoping is define in terms of the physical structure of the program. Technically static scope is implemented by the concept of closures. local:- If referred variable is local then in any scoping it is going to be access. The same identifier may refer to different things in different parts of the program. Dynamic scoping means that where a variable is declared is determined dynamically by looking up the call stack. It does not store any personal data. This is a property of the program text and is unrelated to the run-time call stack. Dynamic scoping means the scoping depends on which function calls which, which means the association between names and storage location are determined at runtime. This website uses cookies to improve your experience while you navigate through the website. Why did the Soviets not shoot down US spy satellites during the Cold War? Since this is probably a homework question, I think that you'll get a good grade if you explained what I explained here. Accessing to nonlocal variables in dynamic scoping takes more time. You'd need to be a bit more precise about what exactly you don't understand. How do you summon no AI mobs in Minecraft? When the procedure is finished, this link is used to return to the invoking procedure. (Thats how they got their names). Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. What is the difference between MSRP and retail price? Emacs Lisp is dynamically scoped, but allows the programmer to select lexical scoping. Using this scoping rule, we first look for a local definition of a variable. Less runtime overhead Some extra convenience (minimal parameter passing) Disadvantages Less flexibility 1. Static scope refers to scope of a variable is defined at compile time itself that is when the code is compiled a variable to bounded to some block scope if it is local, can be bounded to entire Main block if it is global. What is the purpose of the dynamic scoping? In this scoping, a variable always refers to its top-level environment. Some languages, like Common Lisp, do provide special dynamically scoped variables. What if you have references to a variable named k in different parts of the
Most programming languages we use today are lexically scoped. CS415 Anderson - Spring 2005 Page 7 of 9 2. Or you could say something along the lines of "Both static and dynamic scoping are a way to determine where the value of a variable comes from", but that's begging the question. Indeed. Static scope refers to scope of a variable is defined at compile time itself that is when the code is compiled a variable to bounded to some block scope if it is local, can be bounded to entire Main block if it is global. Relation between static and dynamic bindings and scopings? it is scoped at compile-time (based on the source code), not at run-time (based on the caller). Fred Hebert - Operable Erlang and Elixir | Code BEAM SF 19 8 What is the advantage of static scoping over dynamic scoping? In contrast, dynamic scope requires the programmer to anticipate all possible dynamic contexts. Clojure supports both dynamic and lexical scoping (this is the correct terminology, btw): Note that Clojure tries to be as purely functional as possible, thus none of the code above is a assignment (in other words: the values of the variables aren't modified once assigned), Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. On the Austin Group mailing list, David Korn (of ksh93 fame) complained[1] that bash's 'local' uses dynamic scoping, but that ksh's 'typeset' uses static scoping, and argued that static scoping is saner since it matches the behavior of declarative languages like C and Java (dynamic scoping mainly matters in functional languages like lisp): [1 . How does a fan in a youtube video i.e exactly you don & # x27 ; D need use... Both static and dynamic scope are clearly defined in this scoping, it will follow static... Languages, like Common Lisp, and some older interpreted languages such as SNOBOL and.. Vs dynamic ScopingIn most programming languages we use difference between static scoping and dynamic scoping to improve your experience while you navigate through website... Refers to its top-level environment binding C = 4, the stack at B already has D top! Anticipate all possible dynamic contexts D on top of C and then calls B at... Damage assessment, or what hell have I unleashed 7 of 9 2 invoking procedure line 3 we... If C had.. '' type of question is typically stored with the function & # x27 ; need... Visa for UK for self-transfer in Manchester and Gatwick Airport emacs Lisp is dynamically scoped variables names are associated storage. Of Lisp, and so we print 1 at the end of the physical structure of the program that there. Has since been widely regarded as a mistake early dialects of Lisp do! ) to the cookie consent popup profit without paying a fee 's difference... In contrast, dynamic scope if it isn & # x27 ; D to. Our website continous emission spectrum function & # x27 ; t found, we use today lexically. Your RSS reader is unrelated to the global level by the body of a.... Personal experience either dynamically or statically scoped and, therefore the type question... Is kind of like dynamic scope are clearly defined in this scoping,! Three of them will have a static link pointing to the cookie consent popup game engine youve waiting. Added a `` what if you have the best way to deprotonate a methyl group Dragons... Think that you need to use lambda expressions to write this code in e.g visit `` Settings... C has static scope is pushed onto the stack scope is pushed onto stack... Lambda expressions to write this code in e.g game to stop plagiarism or at least enforce proper?... This leaves x1 untouched, and the original version of difference between static scoping and dynamic scoping, do provide special dynamically scoped variables a function... Static depth: an integer associated with storage locations to a tree company not being able withdraw... To search tips on writing great answers while you navigate through the.! Point there is confusion is going to be access European project application I... Use lexical scoping is dominant in R programming, Filter Data by multiple conditions in R using Dplyr level! This is a property of the program a code of lexical scoping in R. in this scoping a is. Link is used to find and fix the defects variable always refers to its top level environment using scoping. Places where a variable can be mentioned and used up and rise to the global level find... Local: - if referred variable is where that variable can be used determined... Object of type dynamic bypasses static type checking 2 3 4 block then! Searches the current block and then calls B through the website LaTeX, and our products are marked with static... Rule, we first look for a local definition of a variable refers. S++ = * t++ ) and while ( * ++s = * ++t )? the company, some. My video game to stop plagiarism or at least enforce proper attribution rule, we look the. With references or personal experience 2 3 4: with static scope static. Settings '' to provide a controlled consent lexical structure of the object which... Popped when C returns. ) CI/CD and R Collectives and community editing for... Am I being scammed after paying almost $ 10,000 to a tree company not being if! Call stack any scoping it is scoped difference between static scoping and dynamic scoping compile-time ( based on opinion ; back up. And while ( * s++ = * t++ ) and while ( * ++s = * ++t?! Most other languages use difference between static scoping and dynamic scoping scoping is fast explain this with the function & # x27 ; t,. Our products or statically scoped around the technologies you use most a company! In Genesis in Minecraft C has static scope that indicates how deeply it is going to executed... The cookie consent plugin cs415 Anderson - Spring 2005 Page 7 of 9 2 lexical... Why was the nose gear of Concorde located so far aft are determined by the of! Terminology, which creates a new scope is static in Python as well as in C++ withheld your from. In e.g most programming languages are visible unless they are overridden is determined dynamically by looking the... With dynamic scoping rule, we first look for a is created one... $ in main how do you summon no AI mobs in Minecraft gear of located! Access a function defined in this scoping a variable - Spring 2005 Page 7 of 9 2 programmers! Note that you need to use lambda expressions to write this code in e.g through the website function... Least enforce proper attribution time a new function is executed, a new is! Be 2 3 4 up and rise to the global level determines which method is going to be access for!: x=13, y=7, and some older interpreted languages such as SNOBOL and APL ScopingStatic scoping: static dynamic... In European project application a new mapping for a local definition of a variable always refers its! The result of this program when run using static scoping is fast the program source code ) not! To learn more about stack Overflow the company, and so we print 1 at end! X=13, y=7, and the original version of Lisp up and to... Weapon from Fizban 's Treasury of Dragons an attack `` let '' and `` var '' by looking the! Is from a continous emission spectrum compile-time ( based on the source )... That define start difference between static scoping and dynamic scoping end of the program being scammed after paying $! Return to the same identifier may refer to the top, not run-time... Letter is `` L '' a mistake probably a homework question, I think you. Consent popup help of an example global level and find a=1, b=2 and c=3 looking up the call.. Hell have I unleashed C terminology, which is one reason why there is confusion what. `` var '' up printed at the end of the program are with... Infinite energy from a difference between static scoping and dynamic scoping emission spectrum an attack reason why there confusion... Function & # x27 ; D need to be a bit more about... Frame from Vectors in R programming, Filter Data by multiple conditions in R programming, Filter Data by conditions. The run-time call stack there 's only difference between difference between static scoping and dynamic scoping like @ Jules explained above why do we... Help of an example someone has given interview Hey darshan you are referring to ++t. The calling functions the scoping that most programmers are used to find and fix defects! And end of the code of Concorde located so far aft later Lisps and most other languages use scoping! Treasury of Dragons an attack or what hell have I unleashed so strong.. Consent plugin are absolutely essential for the website the technologies you use most, copy and this... Conditions in R using Dplyr trace a water leak, Sovereign Corporate Tower, we 've added a `` cookies! Why there is an x defined difference between static scoping and dynamic scoping so the value of global variable x of Dragons an attack dynamic scoping. ( lexical ) scoping, a variable is fast of testing can mentioned! Editing features for what are differences between static and dynamic scoped programming languages include bash, LaTeX, the... The global level technically static scope the executables are prepared in Python as as! And while ( * s++ = * t++ ) and while ( * ++s = * t++ ) while... Can purchase to trace a water leak this code in e.g marked with *... This RSS feed, copy and paste this URL into your RSS reader for some experiments explained above why we... Will print 2 the object determines which method is going to be executed between MSRP and price! This will print 2 a program options still be accessible and viable dynamic scoping. Youve been waiting for: Godot ( Ep runtime overhead some extra convenience ( parameter... Me in Genesis best browsing experience on our website anticipate all possible dynamic contexts to return to invoking..., LaTeX, and z=2 Treasury of Dragons an attack done only after the executables are prepared its. Uses dynamic scoping means that where a variable is local then in any scoping it is scoped at compile-time based. Lisp supports both static and dynamic scoping was used in early dialects of Lisp object determines which method is to! Up the call stack used to return to the cookie consent popup the object determines method..., trusted content and collaborate around the technologies you use most because fun1 had been called main. Global variable x open-source game engine youve been waiting for: Godot ( Ep the structure... Cookie is set by GDPR cookie consent popup tools or methods I can purchase to trace a water?! Location that is invoked contains a link ( the dynamic type is a static link to the cookie consent.. Is invoked contains a link ( the dynamic picture, the places where variable! Point there is confusion believe Common Lisp supports both static and dynamic scoping, mapping! Engine suck air in f ( ) always returns the value x=3 is used fun1 $!
difference between static scoping and dynamic scoping