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function array_splice (arr, offst, lgth, replacement) {
// http://jsphp.co/jsphp/fn/view/array_splice
// + original by: Brett Zamir (http://brett-zamir.me)
// + input by: Theriault
// % note 1: Order does get shifted in associative array input with numeric indices,
// % note 1: since PHP behavior doesn't preserve keys, but I understand order is
// % note 1: not reliable anyways
// % note 2: Note also that IE retains information about property position even
// % note 2: after being supposedly deleted, so use of this function may produce
// % note 2: unexpected results in IE if you later attempt to add back properties
// % note 2: with the same keys that had been deleted
// - depends on: is_int
// * example 1: input = {4: "red", 'abc': "green", 2: "blue", 'dud': "yellow"};
// * example 1: array_splice(input, 2);
// * returns 1: {0: "blue", 'dud': "yellow"}
// * results 1: input == {'abc':"green", 0:"red"}
// * example 2: input = ["red", "green", "blue", "yellow"];
// * example 2: array_splice(input, 3, 0, "purple");
// * returns 2: []
// * results 2: input == ["red", "green", "blue", "purple", "yellow"]
// * example 3: input = ["red", "green", "blue", "yellow"]
// * example 3: array_splice(input, -1, 1, ["black", "maroon"]);
// * returns 3: ["yellow"]
// * results 3: input == ["red", "green", "blue", "black", "maroon"]
var _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 (replacement && typeof replacement !== 'object') {
replacement = [replacement];
}
if (lgth === undefined) {
lgth = offst >= 0 ? arr.length - offst : -offst;
} else if (lgth < 0) {
lgth = (offst >= 0 ? arr.length - offst : -offst) + lgth;
}
if (Object.prototype.toString.call(arr) !== '[object Array]') {
/*if (arr.length !== undefined) { // Deal with array-like objects as input
delete arr.length;
}*/
var lgt = 0,
ct = -1,
rmvd = [],
rmvdObj = {},
repl_ct = -1,
int_ct = -1;
var returnArr = true,
rmvd_ct = 0,
rmvd_lgth = 0,
key = '';
// rmvdObj.length = 0;
for (key in arr) { // Can do arr.__count__ in some browsers
lgt += 1;
}
offst = (offst >= 0) ? offst : lgt + offst;
for (key in arr) {
ct += 1;
if (ct < offst) {
if (this.is_int(key)) {
int_ct += 1;
if (parseInt(key, 10) === int_ct) { // Key is already numbered ok, so don't need to change key for value
continue;
}
_checkToUpIndices(arr, int_ct, key); // Deal with situation, e.g.,
// if encounter index 4 and try to set it to 0, but 0 exists later in loop
arr[int_ct] = arr[key];
delete arr[key];
}
continue;
}
if (returnArr && this.is_int(key)) {
rmvd.push(arr[key]);
rmvdObj[rmvd_ct++] = arr[key]; // PHP starts over here too
} else {
rmvdObj[key] = arr[key];
returnArr = false;
}
rmvd_lgth += 1;
// rmvdObj.length += 1;
if (replacement && replacement[++repl_ct]) {
arr[key] = replacement[repl_ct];
} else {
delete arr[key];
}
}
// arr.length = lgt - rmvd_lgth + (replacement ? replacement.length : 0); // Make (back) into an array-like object
return returnArr ? rmvd : rmvdObj;
}
if (replacement) {
replacement.unshift(offst, lgth);
return Array.prototype.splice.apply(arr, replacement);
}
return arr.splice(offst, lgth);
}
