Edit array_shift version 36 | JsPHP: a JavaScript library providing the PHP API

Function: array_shift version 36

Function:	array_shift View array_shift Edit array_shift Edit code Edit tests Edit benchmark View latest code Edit latest code Benchmark array_shift Comment on array_shift Comment on the latest code View revisions View versions View contributors View dependencies View comments View links Download production code Download development code View the PHP docs View phpjs.org View phpjs.org raw code
Description:	Pops an element off the beginning of the array.

Version:	36 View this version Edit this version Comment on this version Diff this version
Status:	latest
Date:	2011-12-20 04:36
Summary:	Import from phpjs.
Programmer:	jj5

Edit function

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;
    */
}

JsPHP: a JavaScript library providing the PHP API

Function: array_shift version 36

Comments