In re. Closures

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John Duprey
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  2. In re. Closures HTML Codes
  3. In re. Closures JS Codes

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In regards to Javascript closures: "Closures are functions that refer to independent (free) variables (variables that are used locally, but defined in an enclosing scope). In other words, these functions 'remember' the environment in which they were created.. What is a in re. closures? How do you make a in re. closures? This script and codes were developed by John Duprey on 23 January 2023, Monday.

In re. Closures Previews
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In re. Closures - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>In re. Closures</title>
</head>
<body> <h1>In regards to Javascript closures...</h1>
<blockquote> "Closures are functions that refer to independent (free) variables (variables that are used locally, but defined in an enclosing scope). In other words, these functions 'remember' the environment in which they were created.
... functions in JavaScript form closures. A closure is the combination of a function and the lexical environment within which that function was declared. This environment consists of any local variables that were in-scope at the time that the closure was created.
...
Closures are useful because they let you associate some data (the lexical environment) with a function that operates on that data. This has obvious parallels to object oriented programming, where objects allow us to associate some data (the object's properties) with one or more methods."
</blockquote>
<p>-- <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Closures">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Closures</a></p>
<h3>To see a Javascript demonstration, change the view to "<strong>Editor View</strong>" and click the <strong>console button</strong> at the bottom of the screen.</h3> <script src="js/index.js"></script>
</body>
</html>

In re. Closures - Script Codes JS Codes

/**
In regards to Javascript closures - "Closures are functions that refer to independent (free) variables (variables that are used locally, but defined in an enclosing scope). In other words, these functions 'remember' the environment in which they were created.
... functions in JavaScript form closures. A closure is the combination of a function and the lexical environment within which that function was declared. This environment consists of any local variables that were in-scope at the time that the closure was created.
...
Closures are useful because they let you associate some data (the lexical environment) with a function that operates on that data. This has obvious parallels to object oriented programming, where objects allow us to associate some data (the object's properties) with one or more methods. " -- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Closures
*/
var a = "Global Variable A";
var b = "Global Variable B"
function foo(p1){ // closure contains: independent/free variable a and b that can be referred to locally b = p1; c = "Foo Variable C"; console.log('FOO before BAR: a=' + a + ' b=' + b + ' c=' + c); function bar(p2){ // closure contains: independent/free variable a, b, and c that can be referred to locally var c = p2; var d = "Bar Variable D"; console.log('BAR: a=' + a + ' b=' + b + ' c=' + c + ' d=' + d); } bar("Bar C Value"); console.log('FOO after BAR: a=' + a + ' b=' + b + ' c=' + c);
}
console.log('Global: a=' + a + ' b=' + b);
foo("Foo Variable B");
In re. Closures - Script Codes
In re. Closures - Script Codes
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Developer John Duprey
Username jduprey
Uploaded January 23, 2023
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Views 2,024
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