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Array.js
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Array.js
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/**
* Array.js - v0.0.3
*
* - $contains(v) / $include(v)
* - $removeValue(v)
* - $remove(index)
* - $removeIf(fn)
* - $drop(n)
* - $keepIf(fn)
* - $replace(newValues)
* - $clear()
* - $each(fn)
* - $unique(fn)
* - $get(index)
* - $getAll(index1, index2, ...) / $getAll(indexes1, indexes2, ...)
* - $first()
* - $last()
* - $set(index, value)
* - $copy()
* - $isEmpty()
* - $all(fn)
* - $any(fn)
* - $map(fn) / $collect(fn)
* - $reduce(fn)
* - $find(fn)
* - $findAll(fn) / $filter(fn)
* - $exist(fn)
* - $reject(fn)
* - $grep(pattern)
* - $keys(value, strict) / $indexesOf(value, strict)
* - $sort(compare)
* - $rsort(compare)
* - $arsort(compare)
* - $diff(array2)
* - $intersect(array2)
* - $max(compare)
* - $min(compare)
* - $swap(index1, index2)
* - $sum(fn)
* - $product(fn)
* - $chunk(size)
* - $combine(array1, ...)
* - $pad(value, size)
* - $fill(value, length)
* - $shuffle()
* - $rand(size)
* - $size() / $count()
* - $push(value1, value2, ...)
* - $pushAll(array2)
* - $insert(index, obj1, ...)
* - $asc(field)
* - $desc(field)
* - $equal(array2)
* - $loop(fn)
* - $asJSON(field)
* - Array.$range(start, end, step)
* - Array.$isArray(obj)
*
* @author 刘祥超 <iwind.liu@gmail.com>
*/
/**
* 空对象
*/
Array.$nil = {};
/**
* 判断数组中是否包含某个值
*/
Array.prototype.$contains = function (v) {
var that = this;
if (that == null) {
return false;
}
for (var i = 0; i < that.length; i++) {
if (that[i] == v) {
return true;
}
}
return false;
};
/**
* 同$contains(v)
*/
Array.prototype.$include = function (v) {
var that = this;
if (that == null) {
return false;
}
return that.$contains(v);
};
/**
* 从数组中删除某个值
*/
Array.prototype.$removeValue = function (v) {
var that = this;
if (that == null) {
return true;
}
var newArray = [];
for (var i = 0; i < that.length; i++) {
if (that[i] != v) {
newArray.push(that[i]);
}
}
that.$clear();
that.$pushAll(newArray);
return true;
};
/**
* 从数组中删除某个位置上的值
*/
Array.prototype.$remove = function (index) {
var that = this;
if (that == null) {
return true;
}
that.splice(index, 1);
return true;
};
/**
* 删除所有满足条件的元素,并返回删除的元素的个数
*/
Array.prototype.$removeIf = function (fn) {
var that = this;
if (that == null) {
return 0;
}
var oldLength = that.length;
var left = that.$reject(fn);
that.$replace(left);
return oldLength - that.length;
};
/**
* 删除后几个元素,并返回删除后的元素集合
*/
Array.prototype.$drop = function (n) {
n = parseInt(n, 10);
if (isNaN(n) || n <= 0) {
return [];
}
if (n > this.length) {
n = this.length;
}
return this.splice(this.length - n, n);
};
/**
* 保留所有满足条件的元素,删除不满足条件的元素
*/
Array.prototype.$keepIf = function (fn) {
var that = this;
if (that == null) {
return 0;
}
var oldLength = that.length;
var left = that.$findAll(fn);
that.$replace(left);
return oldLength - that.length;
};
/**
* 将当前数组的元素替换成新的数组中的元素
*/
Array.prototype.$replace = function (newValues) {
var that = this;
if (that == null) {
return false;
}
if (!Array.isArray(newValues)) {
return false;
}
that.splice.apply(that, [0, that.length].concat(newValues));
return true;
};
/**
* 清空数组
*/
Array.prototype.$clear = function () {
var that = this;
if (that == null) {
return true;
}
if (that.length == 0) {
return true;
}
that.splice(0, that.length);
return true;
};
/**
* 遍历数组
*/
Array.prototype.$each = function (fn) {
var that = this;
if (that == null) {
return true;
}
if (typeof(fn) != "function") {
return true;
}
var length = that.length;
for (var i = 0; i < length; i++) {
fn.call(that, i, that[i]);
}
return true;
};
/**
* 去除数组中的相同数据
*/
Array.prototype.$unique = function (fn) {
var that = this;
if (that == null) {
return true;
}
var newArray = [];
var indexes = [];
that.$each(function (k, v) {
if (typeof(fn) == "function") {
v = fn.call(that, k, v);
}
if (!newArray.$contains(v)) {
newArray.push(v);
indexes.push(k);
}
});
var copy = that.$copy();
that.$clear();
for (var i = 0; i < indexes.length; i++) {
that.push(copy[indexes[i]]);
}
return true;
};
/**
* 获取某个索引位置上的值
*/
Array.prototype.$get = function (index) {
var that = this;
if (that == null) {
return null;
}
if (index > that.length - 1) {
return null;
}
return that[index];
};
/**
* 获取一组索引对应的值
*
* 如果超出索引范围,则不返回数据
*/
Array.prototype.$getAll = function (index1) {
var that = this;
if (that == null) {
return [];
}
var values = [];
for (var i = 0; i < arguments.length; i ++) {
var arg = arguments[i];
if (Array.$isArray(arg)) {
values.$pushAll(that.$getAll.apply(that, arg));
}
else if (typeof(arg) == "number" && arg < that.length) {
values.$push(that.$get(arg));
}
else if (typeof(arg) == "string" && /^\\d+$/.test(arg)) {
arg = parseInt(arg);
if (arg < that.length) {
values.$push(that.$get(arg));
}
}
}
return values;
};
/**
* 设置某个索引位置上的值
*/
Array.prototype.$set = function (index, value) {
var that = this;
if (that == null) {
return false;
}
if (index > that.length - 1) {
return false;
}
that[index] = value;
return true;
};
/**
* 拷贝数组
*/
Array.prototype.$copy = function () {
var that = this;
if (that == null) {
return that;
}
var newArray = [];
for (var i = 0; i < that.length; i++) {
newArray.push(that[i]);
}
return newArray;
};
/**
* 判断数组是否为空
*/
Array.prototype.$isEmpty = function () {
var that = this;
if (that == null) {
return true;
}
return (that.length == 0);
};
/**
* 对容器中元素应用迭代器,并判断是否全部返回真
*/
Array.prototype.$all = function (fn) {
var that = this;
if (that == null) {
return false;
}
for (var i = 0; i < that.length; i ++) {
if (!fn.call(that, i, that[i])) {
return false;
}
}
return true;
};
/**
* 对容器中元素应用迭代器,并判断是否有一次返回真
*/
Array.prototype.$any = function (fn) {
var that = this;
if (that == null) {
return false;
}
for (var i = 0; i < that.length; i ++) {
if (fn.call(that, i, that[i])) {
return true;
}
}
return false;
};
/**
* 对容器中元素应用迭代器,并将每次执行的结果放入一新数组中
*/
Array.prototype.$map = function (fn) {
var that = this;
if (that == null) {
return [];
}
var arr = [];
for (var i = 0; i < that.length; i ++) {
var result = fn.call(that, i, that[i]);
if (result === Array.$nil) {
continue;
}
arr.push(result);
}
return arr;
};
/**
* 对容器中元素应用迭代器,并将每次执行的结果放入到下一次迭代的参数中
*/
Array.prototype.$reduce = function (fn) {
var that = this;
if (that == null) {
return null;
}
var value = null;
that.$each(function (k, v) {
value = fn.call(that, k, v, value);
});
return value;
};
/**
* 对容器中元素应用迭代器,并将每次执行的结果放入一新数组中
*/
Array.prototype.$collect = function (fn) {
var that = this;
if (that == null) {
return [];
}
return that.$map(fn);
};
/**
* 对容器中元素应用迭代器,只要有一次返回值即立即返回由当前元素的索引
*/
Array.prototype.$find = function (fn) {
var that = this;
if (that == null) {
return -1;
}
if (typeof(fn) == "undefined") {
return that.$get(0);
}
var index = -1;
var result = null;
that.$each(function (k, v) {
if (index > -1) {
return;
}
if (fn.call(that, k, v)) {
index = k;
result = v;
}
});
return result;
};
/**
* 对容器中元素应用迭代器,将所有返回真的元素放入一数组中
*/
Array.prototype.$findAll = function (fn) {
var that = this;
if (that == null) {
return [];
}
if (typeof(fn) == "undefined") {
return that.$copy();
}
var result = [];
that.$each(function (k, v) {
if (fn.call(that, k, v)) {
result.push(v);
}
});
return result;
};
/**
* 同$findAll()
*/
Array.prototype.$filter = function (fn) {
var that = this;
if (that == null) {
return [];
}
return that.$findAll(fn);
};
/**
* 对容器中元素应用迭代器,判断返回true的元素是否存在
*/
Array.prototype.$exist = function (fn) {
return this.$findAll(fn).length > 0;
};
/**
* 对容器中元素应用迭代器,将所有返回假的元素放入一数组中
*/
Array.prototype.$reject = function (fn) {
var that = this;
if (that == null) {
return [];
}
if (typeof(fn) == "undefined") {
return [];
}
var result = [];
that.$each(function (k, v) {
if (!fn.call(that, k, v)) {
result.push(v);
}
});
return result;
};
/**
* 找出匹配某正则表达式的元素,返回匹配的元素数组
*/
Array.prototype.$grep = function (pattern) {
var that = this;
if (that == null) {
return [];
}
return that.$findAll(function (k, v) {
if (v == null) {
return false;
}
return pattern.test(v.toString());
});
};
/**
* 取得某一个值在数组中出现的所有的键的集合
*/
Array.prototype.$keys = function (value, strict) {
var that = this;
if (that == null) {
return [];
}
if (arguments.length == 0) {
return Array.$range(0, that.length - 1);
}
var keys = [];
if (typeof(strict) == "undefined") {
strict = false;
}
for (var i = 0; i < that.length; i++) {
if ((strict && value === that[i]) || (!strict && value == that[i])) {
keys.push(i);
}
}
return keys;
};
/**
* 取得某一个值在数组中出现的所有的键的集合
*/
Array.prototype.$indexesOf = function (value, strict) {
var that = this;
if (that == null) {
return [];
}
if (arguments.length == 0) {
return Array.$range(0, that.length - 1);
}
return that.$keys(value, strict);
};
/**
* 对该数组进行正排序
*/
Array.prototype.$sort = function (sortFunction) {
var that = this;
if (that == null) {
return false
}
if (typeof(sortFunction) == "undefined") {
sortFunction = function (v1, v2) {
if (v1 > v2) {
return 1;
}
else if (v1 == v2) {
return 0;
}
else {
return -1;
}
};
}
that.sort(sortFunction);
return true;
};
/**
* 对该数组进行反排序
*/
Array.prototype.$rsort = function (sortFunction) {
var that = this;
if (that == null) {
return false
}
this.$sort(sortFunction);
that.reverse();
return true;
};
/**
* 对该数组进行正排序,并返回排序后对应的索引
*/
Array.prototype.$asort = function (sortFunction) {
var that = this;
if (that == null) {
return []
}
var indexes = [];
for (var i = 0; i < that.length; i ++) {
indexes.push(i);
}
if (typeof(sortFunction) == "undefined") {
sortFunction = function (e1, e2) {
if (e1 < e2) return - 1;
if (e1 > e2) return 1;
return 0;
};
}
for (i = 0; i < that.length; i ++) {
for (var j = 0; j < that.length; j ++) {
if (j > 0 && sortFunction(that[j-1], that[j]) > 0) {
that.$swap(j, j - 1);
indexes.$swap(j, j - 1);
}
}
}
return indexes;
};
/**
* 对该数组进行反排序,并返回排序后对应的索引
*/
Array.prototype.$arsort = function (sortFunction) {
var that = this;
if (that == null) {
return []
}
var indexes = that.$asort(sortFunction);
that.reverse();
indexes.reverse();
return indexes;
};
/**
* 取当前数组与另一数组的差集
*/
Array.prototype.$diff = function (array2) {
var that = this;
if (that == null) {
return []
}
var result = [];
that.$each(function (k, v) {
if (!array2.$contains(v)) {
result.push(v);
}
});
return result;
};
/**
* 取当前数组与另一数组的交集
*/
Array.prototype.$intersect = function (array2) {
var that = this;
if (that == null) {
return []
}
var result = [];
that.$each(function (k, v) {
if (array2.$contains(v)) {
result.push(v);
}
});
return result;
};
/**
* 取得当前集合中最大的一个值
*/
Array.prototype.$max = function (sortFunction) {
var that = this;
if (that == null) {
return null;
}
if (that.length > 0) {
var _array = that.$copy();
_array.$rsort(sortFunction);
return _array.$get(0);
}
return null;
};
/**
* 取得当前集合中最小的一个值
*/
Array.prototype.$min = function (sortFunction) {
var that = this;
if (that == null) {
return null;
}
if (that.length > 0) {
var _array = that.$copy();
_array.$sort(sortFunction);
return _array.$get(0);
}
return null;
};
/**
* 交换数组的两个索引对应的值
*/
Array.prototype.$swap = function (index1, index2) {
var that = this;
if (that == null) {
return false;
}
var value1 = that.$get(index1);
var value2 = that.$get(index2);
that.$set(index1, value2);
that.$set(index2, value1);
return true;
};
/**
* 计算数组中的所有元素的总和
*/
Array.prototype.$sum = function (fn) {
var that = this;
if (that == null) {
return 0;
}
var sum = 0;
that.$each(function (k, v) {
if (typeof(fn) == "function") {
v = fn.call(that, k, v);
}
if (typeof(v) == "number") {
sum += v;
}
else if (typeof(v) == "string") {
var n = parseFloat(v);
if (!isNaN(n)) {
sum += n;
}
}
});
return sum;
};
/**
* 计算数组中的所有元素的乘积
*/
Array.prototype.$product = function (fn) {
var that = this;
if (that == null) {
return 0;
}
var result = 1;
that.$each(function (k, v) {
if (typeof(fn) == "function") {
v = fn.call(that, k, v);
}
if (typeof(v) == "number") {
result *= v;
}
else if (typeof(v) == "string") {
var n = parseFloat(v);
if (!isNaN(n)) {
result *= n;
}
}
});
return result;
};
/**
* 返回数组分成新多个片段的结果
*/
Array.prototype.$chunk = function (size) {
var that = this;
if (that == null) {
return [];
}
if (typeof(size) == "undefined") {
size = 1;
}
size = parseInt(size);
if (isNaN(size) || size < 1) {
return [];
}
var result = [];
for (var i = 0; i < that.length / size; i ++) {
result.$push(that.slice(i * size, (i + 1) * size));
}
return result;
};
/**
* 取得当前数组和其他数组组合之后的结果
*/
Array.prototype.$combine = function (array1) {
var that = this;
if (that == null) {
return [];
}
var result = that.$chunk(1);
for (var i = 0; i < arguments.length; i ++) {
var arr = arguments[i];
if (Array.$isArray(arr)) {
for (var j = 0; j < that.length; j ++) {
result[j].$push(arr.$get(j));
}
}
}
return result;
};
/**
* 填充数组
*/
Array.prototype.$pad = function (value, size) {
var that = this;
if (that == null) {
return false;
}
if (typeof(size) == "undefined") {
size = 1;
}
if (size < 1) {
return false;
}
for (var i = 0; i < size; i ++) {
that.push(value);
}
return true;
};
/**
* 填充数组到一定长度
*/
Array.prototype.$fill = function (value, length) {
var that = this;
if (that == null) {
return false;
}
if (typeof(length) == "undefined") {
length = that.length;
}
if (length < that.length) {
return false;
}
if (length == that.length) {
return true;
}
var size = length - that.length;
for (var i = 0; i < size; i ++) {
that.push(value);
}
return true;
};
/**
* 打乱数组中元素顺序
*/
Array.prototype.$shuffle = function () {
var that = this;
if (that == null) {
return false;
}
that.$sort(function() {
return Math.random() - 0.5;
});
return true;
};
/**
* 随机截取数组片段
*/
Array.prototype.$rand = function (size) {
var that = this;
if (that == null) {
return false;
}
if (typeof(size) == "undefined") {
size = 1;
}
var copy = that.$copy();
copy.$shuffle();
return copy.slice(0, size);
};
/**
* 计算元素数量
*/
Array.prototype.$size = function (fn) {
if (typeof fn == "function") {
return this.$findAll(fn).length;
}
var that = this;
if (that == null) {
return 0;
}
return that.length;
};
/**
* 同$size()
*/
Array.prototype.$count = function (fn) {
return this.$size(fn);
};
/**
* 取得第一个元素值
*/
Array.prototype.$first = function () {
var that = this;
if (that == null) {
return null;
}
if (that.length == 0) {
return null;
}
return that.$get(0);
};
/**
* 取得第一个元素值
*/
Array.prototype.$last = function () {
var that = this;
if (that == null) {
return null;
}
if (that.length == 0) {
return null;
}
return that[that.length - 1];
};
/**
* 在尾部加入一个或多个元素
*/
Array.prototype.$push = function () {
var that = this;
if (that == null) {
return 0;
}
return Array.prototype.push.apply(that, arguments);
};
/**
* 一次性加入多个元素
*/
Array.prototype.$pushAll = function (array2) {
var that = this;
if (that == null) {
return 0;
}
return Array.prototype.push.apply(that, array2);
};
/**
* 在指定位置插入新的元素
*/
Array.prototype.$insert = function (index, obj1) {
var that = this;
if (that == null) {
return false;
}
var args = [];
if (arguments.length == 0) {
return false;
}
for (var i = 1; i < arguments.length; i ++) {
args.push(arguments[i]);
}
if (index < 0) {
index = that.length + index + 1;
}
that.splice.apply(that, [index, 0].concat(args));
return true;
};
/**
* 依据单个字段进行正排序
*/
Array.prototype.$asc = function (field) {
var that = this;
if (that == null) {
return false;
}
return that.$sort(function (v1, v2) {
if (typeof(v1) == "object" && typeof(v2) == "object") {
if (v1[field] > v2[field]) {
return 1;
}
if (v1[field] == v2[field]) {
return 0;
}
return -1;