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jsonkit

v0.3.2

Published

Tool set for JSON object

Downloads

26

Readme

JSONKit v0.3.2 Build Status

Tool set for JSON object.

Install

Node.js:

npm install jsonkit

bower:

bower install jsonkit

Browser:

<script src="/pathTo/jsonkit.js"></script>

API

JSONKit.each(obj, iterator[, context, arrayLike, right])

迭代器,对数组或者对象的键值进行迭代。

  • obj: ArrayObject
  • iterator: Function,function (value, key, obj) {}
  • context: Object, 绑定至 iteratorthis
  • arrayLike: Boolean, 为 true 时按数组迭代,为 false 则按对象迭代,否则自动判断
  • right: Boolean, 如果是按数组迭代,这里指定是否反向迭代
JSONKit.each([1, 2, 3, 4, 5], function (value, index, list) {
  console.log('each', value, index, list);
});

JSONKit.each({a: 1, b: 2, c: 3}, function (value, index, list) {
  console.log('each', value, index, list);
});

JSONKit.extend(obj[, obj1, obj2, ...])

属性复制,将 obj1、obj2、...objx 的属性复制到 obj,对于同名属性,后者覆盖前者,返回 obj。

var obj = {a: 3, b: 4, c: 5};
console.log('extend', JSONKit.extend(obj, {a: 0, d: []}, {e: 6}));

JSONKit.union(obj[, obj1, obj2, ...])

深度并集复制,用于数据深克隆,将 obj1、obj2、...objx 的属性深度复制到 obj,对于同名属性,后者覆盖前者,返回 obj。当只有一个参数 obj 时,则对 obj 进行深度复制,返回新的复制对象

  • obj: ArrayObject,当 objx 类型与 obj 不一致时,自动忽略。
var d = [1, 2, {a: 3, b: 4, c: 5}];
console.log('union', JSONKit.union(d));
console.log('union', JSONKit.union(d, [0, 0, {a: 0}]));

JSONKit.intersect(obj, obj1[, obj2, ...])

深度交集复制,用于数据深过滤,将 obj1、obj2、...objx 共同具有的且类型相同的属性值深度复制到 obj,后者覆盖前者,返回 obj。

  • obj: ArrayObject,当 objx 类型与 obj 不一致时抛出错误。
var e = [0, '', {a: 0, b: false, c: null}];
console.log('intersect', JSONKit.intersect(e, [9, 9, {a: 9, c: {}}]));

情况1: 当 obj 中属性/子属性值为空对象或空数组时,表示接受任意对象或任意数组:

e = {a: {}, b: []};
console.log('intersect', JSONKit.intersect(e, {a: {a: 1, b:2, c: [1, 2]}, b: [1, 2, {a: 3}]}));

情况2: 当 obj 中属性/子属性值为数组且长度为 1 时,表示接受任意长度的数组,但数组值必须为指定类型,不合法数据自动忽略:

e = {a: [0]};
console.log('intersect', JSONKit.intersect(e, {a: [1, 2, '3', 4]}));

情况3: 当 obj 中属性/子属性值为数组且长度大于 1 时,表示接受定长的数组,但数组值类型必须与对应位置的类型一致,不合法数据被赋值为 null

e = {a: [0, 0, 0, 0, 0]};
console.log('intersect', JSONKit.intersect(e, {a: [1, 2, '3', 4]}));

情况4: 当 obj 中属性/子属性值为 null 时,表示接受任意类型的数据:

e = {a: null};
console.log('intersect', JSONKit.intersect(e, {a: {a: 1, b:2, c: [1, 2]}}));

JSONKit.isEqual(a, b[, depth])

对 a, b 进行深度对比,判断他们是否相等,返回 Boolean 值。

  • a: Any
  • b: Any
  • depth: 可选,指定比较的最大深度,超过时将抛出错误,默认为 20setMaxDepth 的设置值。
var a = {a: 1, b: 2, c: 3, d: [1, 2, 3], e: null};
var b = {a: 1, b: 2, c: 3, d: [1, 2, 3], e: null};
console.log('isEqual', JSONKit.isEqual(a, b));

JSONKit.isEmpty(obj)

判断对象是否为空,返回 Boolean 值,对于非对象,返回 true

  • obj: Any
console.log('isEmpty', JSONKit.isEmpty([]));
console.log('isEmpty', JSONKit.isEmpty({}));

JSONKit.isArray(obj)

判断是否为数组,返回 Boolean 值。

  • obj: Any
console.log('isArray', JSONKit.isArray([]));
console.log('isArray', JSONKit.isArray({}));

JSONKit.isObject(obj)

判断是否为纯对象,返回 Boolean 值。

  • obj: Any
console.log('isObject', JSONKit.isObject({}));
console.log('isObject', JSONKit.isObject([]));
console.log('isObject', JSONKit.isObject(new Date()));

JSONKit.removeItem(list, item, arrayLike)

删除 list 中的所有 item,直接修改 list 自身,返回已删除 item 的数量。

  • list: ArrayObject

  • item: Any, 当 item 为函数时,会调用该函数

    item(value, index)

    如果其返回值为 true,则删除 list 中的对应值。

  • arrayLike: Boolean, 为 true 时按数组迭代,为 false 则按对象迭代,否则自动判断

var a = [1, 2, 3, null, null];
console.log('removeItem', JSONKit.removeItem(a, null), a);

var b = {a: 1, b: 2, c: 3, d: null, e: null};
console.log('removeItem', JSONKit.removeItem(b, null), b);

JSONKit.findItem(list, fn, arrayLike)

从 list 中找出目标值。

  • list: ArrayObject
  • fn: 断言函数,该函数有三个参数:list 子元素的值、键和 list 自身,如果 fn 返回 true,则为找到目标值,立即返回目标值,不再往后迭代。
  • arrayLike: Boolean, 为 true 时按数组迭代,为 false 则按对象迭代,否则自动判断
a = [1, 1, 2, 3, '1', null, null];
JSONKit.findItem(a, function (x, i) {
  return typeof v === 'string';
}); // '1'

JSONKit.uniqueArray(array)

删除 array 中的重复值,仅对原始类型有效,直接修改 array 自身,返回 array。

  • array: Array
var c = [1, 2, 3, 4, 3, 2];
console.log('uniqueArray', JSONKit.uniqueArray(c), c);

JSONKit.parseJSON(string)

解析 JSON 字符串 string,返回解析值,如果 string 不是标准 JSON,不可解析,则返回 undefined

  • string: String

JSONKit.toStr(any)

console.log('JSONKit.toStr(null)', JSONKit.toStr(null)); // ''
console.log('JSONKit.toStr(undefined)', JSONKit.toStr(undefined)); // ''
console.log('JSONKit.toStr(0)', JSONKit.toStr(0)); // '0'
console.log('JSONKit.toStr(NaN)', JSONKit.toStr(NaN)); // 'NaN'
console.log('JSONKit.toStr(true)', JSONKit.toStr(true)); // 'true'

JSONKit.toNum(any)

解析 JSON 字符串 string,返回解析值,如果 string 不是标准 JSON,不可解析,则返回 undefined

  • string: String
console.log('parseJSON', JSONKit.parseJSON('{}')); // {}
console.log('parseJSON', JSONKit.parseJSON('1')); // 1
console.log('parseJSON', JSONKit.parseJSON('"1"')); // '1'
console.log('parseJSON', JSONKit.parseJSON('a')); // undefined
console.log('parseJSON', JSONKit.parseJSON('null')); // null
console.log('parseJSON', JSONKit.parseJSON('undefined')); // undefined

JSONKit.setMaxDepth(depth)

设置 unionintersect 中允许的对象最大深度,超过时将抛出错误,用于防止对象循环自引用,默认为 20,最小为 5,最大为 1000,返回当前最大深度值。

  • depth: Number