JQuery: What does this code mean?

 

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  • How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method call? 13 answers

    • It means nothing in jQuery as it is JavaScript.

    ~ is an operator that does something that you'd normally think wouldn't have any purpose. It is a unary operator that takes the expression to its right performs this small algorithm on it (where N is the expression to the right of the tilde): -(N+1). See below for some samples. 

    console.log(~-2); // 1
console.log(~-1); // 0
console.log(~0);  // -1
console.log(~1);  // -2
console.log(~2);  // -3

    So, unless you actually have an application that needs to run this algorithm on numbers

    Source Taken from

    inArray

    Search for a specified value within an array and return its index (or -1 if not found).

    so in combination if element not find on (~$.inArray('orange', apple)) it will return zero else index will be converted as above given series.

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