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Summary
Summary - CGS3066: Web Programming and Design Summer 2014
ull is used for representing the intentional absence of an object value and is a primitive value. Unlike undefined, it is not a property of the global object. It is equal to undefined but not identical to it. null == undefined; // true null === undefined; // false CAREFUL: The typeof null is 'object'. typeof null; // 'object'; To properly check if a value is null, compare it with the strict equality operator var a = null; a === null; // true Section 3.2: Testing for NaN using isNaN...
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Summary
Summary - CGS3066: Web Programming and Design Summer 2014
Popular7. How do you write "Hello World" in an alert box? A. alertBox("Hello World"); B. msgBox("Hello World"); C. msg("Hello World"); D. alert("Hello World"); 8. How do you create a function in JavaScript? A. function:myFunction() B. function myFunction() C.function = myFunction() 9.How does a FOR loop start? A. for (i = 0; i <= 5; i++) B. for (i <= 5; i++) C. for (i = 0; i <= 5) D. for i = 1 to 5 10. How can you add a comment in a JavaScript? A. //This is a comment ...
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Summary
Summary - CGS3066: Web Programming and Design Summer 2014
. high-level, dynamic, untyped, and interpreted programming language ... is prototype-based with first-class functions, … ... supporting object-oriented, imperative, and functional programming ... has an API for working with text, arrays, dates and regular expressions ● Not particularly similar to Java: More like C crossed with Self/Scheme ○ C-like statements with everything objects, closures, garbage collection, etc. ● Also known as ECMAScript 2 CS142 Lecture Notes - JavaScript ...
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Summary
Summary - CGS3066: Web Programming and Design Summer 2014
JavaScript is a lightweight, interpreted programming language Designed for creating network-centric applications Complementary to and integrated with Java Complementary to and integrated with HTML Open and cross-platform JavaScript Syntax: A JavaScript consists of JavaScript statements that are placed within the <script>... </script> HTML tags in a web page. You can place the <script> tag containing your JavaScript anywhere within you web page but it...
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