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The detailed semantics of "the" ternary operator as well as its syntax differs significantly from language to language. A top level distinction from one language to another is whether the expressions permit side effects (as in most procedural languages) and whether the language provides short-circuit evaluation semantics, whereby only the selected expression is evaluated (most standard ...
var x1 = 0; // A global variable, because it is not in any function let x2 = 0; // Also global, this time because it is not in any block function f {var z = 'foxes', r = 'birds'; // 2 local variables m = 'fish'; // global, because it wasn't declared anywhere before function child {var r = 'monkeys'; // This variable is local and does not affect the "birds" r of the parent function. z ...
The conditional operator of JavaScript is compatible with the following browsers: Chrome , Edge , Firefox (1), Internet Explorer , Opera , Safari , Android webview, Chrome for Android , Edge Mobile , Firefox for Android (4), Opera for Android, Safari on IOS, Samsung Internet , Node.js .
See also: the {{}} template. The #if function selects one of two alternatives based on the truth value of a test string. {{#if: test string | value if true | value if false}} As explained above, a string is considered true if it contains at least one non-whitespace character.
For example, JavaScript's loose equality rules can cause equality to be intransitive (i.e., a == b and b == c, but a != c), or make certain values be equal to their own negation. [ 2 ] A strict equality operator is also often available in those languages, returning true only for values with identical or equivalent types (in PHP, 4 === "4" is ...
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In C, the number 0 or 0.0 is false, and all other values are treated as true. In JavaScript , the empty string ( "" ), null , undefined , NaN , +0, −0 and false [ 28 ] are sometimes called falsy (of which the complement is truthy ) to distinguish between strictly type-checked and coerced Booleans (see also: JavaScript syntax#Type conversion ...
The null coalescing operator is a binary operator that is part of the syntax for a basic conditional expression in several programming languages, such as (in alphabetical order): C# [1] since version 2.0, [2] Dart [3] since version 1.12.0, [4] PHP since version 7.0.0, [5] Perl since version 5.10 as logical defined-or, [6] PowerShell since 7.0.0, [7] and Swift [8] as nil-coalescing operator.