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Edit: array_shift

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Description:	Pops an element off the beginning of the array.

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Code:	function array_shift (inputArr) { // http://jsphp.co/jsphp/fn/view/array_shift // + original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // + improved by: Martijn Wieringa // % note 1: Currently does not handle objects // * example 1: array_shift(['Kevin', 'van', 'Zonneveld']); // * returns 1: 'Kevin' var props = false, shift = undefined, pr = '', allDigits = /^\d$/, int_ct = -1, _checkToUpIndices = function (arr, ct, key) { // Deal with situation, e.g., if encounter index 4 and try to set it to 0, but 0 exists later in loop (need to // increment all subsequent (skipping current key, since we need its value below) until find unused) if (arr[ct] !== undefined) { var tmp = ct; ct += 1; if (ct === key) { ct += 1; } ct = _checkToUpIndices(arr, ct, key); arr[ct] = arr[tmp]; delete arr[tmp]; } return ct; }; if (inputArr.length === 0) { return null; } if (inputArr.length > 0) { return inputArr.shift(); } /* UNFINISHED FOR HANDLING OBJECTS for (pr in inputArr) { if (inputArr.hasOwnProperty(pr)) { props = true; shift = inputArr[pr]; delete inputArr[pr]; break; } } for (pr in inputArr) { if (inputArr.hasOwnProperty(pr)) { if (pr.search(allDigits) !== -1) { int_ct += 1; if (parseInt(pr, 10) === int_ct) { // Key is already numbered ok, so don't need to change key for value continue; } _checkToUpIndices(inputArr, int_ct, pr); arr[int_ct] = arr[pr]; delete arr[pr]; } } } if (!props) { return null; } return shift; */ }
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