如何在javascript中按属性查找数组中的对象? [英] How to find object in array by property in javascript?
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问题描述
存在包含大量对象的数组。必需找到这个阵列由属性中一个或多个对象
Exist an array with a lot of objects. Required to find an object or objects in this array by property.
输入OBJ:
var Obj = [
{"start": 0, "length": 3, "style": "text"},
{"start": 4, "length": 2, "style": "operator"},
{"start": 4, "length": 3, "style": "error"}
];
输出结果:(搜索 开始 与值4)
Output result: (search for "start" with value 4)
var result = [
{"start": 4, "length": 2, "style": "operator"},
{"start": 4, "length": 3, "style": "error"}
];
推荐答案
_findItemByValue(Obj,start,4);
_findItemByValue(Obj, "start", 4);
var _findItemByValue = function(obj, prop, value) {
return obj.filter(function(item) {
return (item[prop] === value);
});
}
与IE6,IE7,IE8以外的所有产品兼容,但存在 polyfill 。
Compatible with all except IE6, IE7, IE8, but exist polyfill.
if (!Array.prototype.filter) {
Array.prototype.filter = function (fn, context) {
var i,
value,
result = [],
length;
if (!this || typeof fn !== 'function' || (fn instanceof RegExp)) {
throw new TypeError();
}
length = this.length;
for (i = 0; i < length; i++) {
if (this.hasOwnProperty(i)) {
value = this[i];
if (fn.call(context, value, i, this)) {
result.push(value);
}
}
}
return result;
};
}
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