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root/res/zui/lib/array/zui.array.js
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243
root/res/zui/lib/array/zui.array.js
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/*!
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* ZUI: 数组辅助方法 - v1.8.1 - 2018-01-18
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* http://zui.sexy
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* GitHub: https://github.com/easysoft/zui.git
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* Copyright (c) 2018 cnezsoft.com; Licensed MIT
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*/
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/* ========================================================================
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* ZUI: array.js
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* Array Polyfill.
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* http://zui.sexy
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* ========================================================================
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* Copyright (c) 2014-2016 cnezsoft.com; Licensed MIT
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* ======================================================================== */
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// Some polyfills copy from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
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(function() {
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'use strict';
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var STR_FUNCTION = 'function';
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/**
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* Calls a function for each element in the array.
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*/
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if(!Array.prototype.forEach) {
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Array.prototype.forEach = function(fun /*, thisp*/ ) {
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var len = this.length;
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if(typeof fun != STR_FUNCTION)
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throw new TypeError();
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var thisp = arguments[1];
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for(var i = 0; i < len; i++) {
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if(i in this) {
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fun.call(thisp, this[i], i, this);
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}
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}
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};
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}
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/**
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* Judge an object is an real array
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*/
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if(!Array.isArray) {
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Array.isArray = function(obj) {
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return Object.toString.call(obj) === '[object Array]';
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};
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}
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/**
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* Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found.
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*/
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if(!Array.prototype.lastIndexOf) {
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Array.prototype.lastIndexOf = function(elt /*, from*/ ) {
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var len = this.length;
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var from = Number(arguments[1]);
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if(isNaN(from)) {
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from = len - 1;
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} else {
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from = (from < 0) ? Math.ceil(from) : Math.floor(from);
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if(from < 0)
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from += len;
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else if(from >= len)
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from = len - 1;
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}
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for(; from > -1; from--) {
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if(from in this &&
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this[from] === elt)
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return from;
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}
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return -1;
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};
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}
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/**
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* Returns true if every element in this array satisfies the provided testing function.
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*/
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if(!Array.prototype.every) {
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Array.prototype.every = function(fun /*, thisp*/ ) {
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var len = this.length;
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if(typeof fun != STR_FUNCTION)
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throw new TypeError();
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var thisp = arguments[1];
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for(var i = 0; i < len; i++) {
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if(i in this &&
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!fun.call(thisp, this[i], i, this))
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return false;
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}
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return true;
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};
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}
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/**
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* Creates a new array with all of the elements of this array for which the provided filtering function returns true.
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*/
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if(!Array.prototype.filter) {
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Array.prototype.filter = function(fun /*, thisp*/ ) {
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var len = this.length;
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if(typeof fun != STR_FUNCTION)
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throw new TypeError();
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var res = [];
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var thisp = arguments[1];
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for(var i = 0; i < len; i++) {
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if(i in this) {
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var val = this[i]; // in case fun mutates this
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if(fun.call(thisp, val, i, this))
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res.push(val);
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}
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}
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return res;
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};
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}
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/**
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* Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found.
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*/
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if(!Array.prototype.indexOf) {
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Array.prototype.indexOf = function(elt /*, from*/ ) {
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var len = this.length;
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var from = Number(arguments[1]) || 0;
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from = (from < 0) ? Math.ceil(from) : Math.floor(from);
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if(from < 0)
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from += len;
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for(; from < len; from++) {
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if(from in this &&
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this[from] === elt)
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return from;
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}
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return -1;
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};
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}
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/**
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* Creates a new array with the results of calling a provided function on every element in this array.
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*/
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if(!Array.prototype.map) {
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Array.prototype.map = function(fun /*, thisp*/ ) {
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var len = this.length;
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if(typeof fun != STR_FUNCTION)
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throw new TypeError();
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var res = new Array(len);
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var thisp = arguments[1];
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for(var i = 0; i < len; i++) {
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if(i in this)
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res[i] = fun.call(thisp, this[i], i, this);
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}
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return res;
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};
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}
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/**
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* Creates a new array with the results match the condistions
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* @param {plain object or function} conditions
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* @param {array} result
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* @return {array}
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*/
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if(!Array.prototype.where) {
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Array.prototype.where = function(conditions, result) {
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result = result || [];
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var cdt, ok, objVal;
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this.forEach(function(val) {
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ok = true;
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for(var key in conditions) {
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cdt = conditions[key];
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if(typeof cdt === STR_FUNCTION) {
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ok = cdt(val);
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} else {
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objVal = val[key];
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ok = (objVal && objVal === cdt);
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}
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if(!ok) break;
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}
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if(ok) result.push(val);
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});
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return result;
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};
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}
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/**
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* Return a object contains grouped result as object key
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* @param {string} key
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* @return {Object}
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*/
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if(!Array.prototype.groupBy) {
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Array.prototype.groupBy = function(key) {
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var result = {};
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this.forEach(function(val) {
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var keyName = val[key];
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if(!keyName) {
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keyName = 'unkown';
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}
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if(!result[keyName]) {
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result[keyName] = [];
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}
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result[keyName].push(val);
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});
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return result;
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};
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}
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/**
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* Returns true if at least one element in this array satisfies the provided testing conditions.
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* @param {function or plain object} conditions
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* @return {Boolean}
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*/
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if(!Array.prototype.has) {
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Array.prototype.has = function(conditions) {
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var result = false,
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cdt, ok, objVal;
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this.forEach(function(val) {
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ok = true;
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for(var key in conditions) {
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cdt = conditions[key];
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if(typeof cdt === STR_FUNCTION) {
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ok = cdt(val);
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} else {
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objVal = val[key];
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ok = (objVal && objVal === cdt);
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}
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if(!ok) break;
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}
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if(ok) {
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result = true;
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return false;
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}
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});
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return result;
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};
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}
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}());
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