iwt
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iwt is a javascript utility that returns the value passed in when the passed variable is the value of the type you want, otherwise it returns the value of the default type.
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iwt is a javascript utility that returns the value passed in when the passed variable is the value of the type you want, otherwise it returns the value of the default type.
<!-- iwt是一个javascript实用程序，当传递的变量是所需类型的值时，它会返回传入的值，否则它将返回默认类型的值。
-->
```js
var iwt = require("iwt");
```
```js
const arr = { a: ["a"], b: 1 };
const obj = { a: { a: 1 }, b: 1 };
iwt.array(arr.a); // ['a'];
iwt.array(arr.b); // [];
iwt.array(arr.b, ["b"]); // ['b'];
iwt.object(obj.a); // {a: 1};
iwt.object(obj.b); // {};
iwt.object(obj.b, { b: 1 }); // {b: 1};
// ...
// iwt.null
// iwt.undefined
// iwt.function
// iwt.boolean
// iwt.number
// iwt.null
// iwt.null
const get = require("lodash/get");
const a = {};
iwt.object(get(a, "b.c.e.f.g.h")); // {};
```
| methods | return value |
| --------------------------------- | ----------------------------------------------------------------------------------------------------------- |
| array(any, defaultValue) | [] |
| object(any, defaultValue) | {} |
| function(any, defaultValue) | new Function() |
| boolean(any, defaultValue) | true |
| string(any, defaultValue) | '' |
| number(any, defaultValue) | 0 |
| undefined(any, defaultValue) | undefined |
| null(any, defaultValue) | null |
| date(any, defaultValue) | new Date() |
| regExp(any, defaultValue) | new RegExp() |
| symbol(any, defaultValue) | Symbol('symbol') |
| getValue(type, any, defaultValue) | 无 |
| typeOf(any) | "number","string","function", "regExp", "null", "undefined", "date", "boolean", "object", "array", "symbol" |