JavaScript 字符串转数组

# JavaScript 字符串 转数组
## Array.from 函数
`Array.from` 方法用于将两类对象转为真正的数组：类似数组的对象（array-like object）和可遍历（iterable）的对象（包括 ES6 新增的数据结构 Set 和 Map）
```js
// 类数组对象
const arrayLike = {
	'0': 'a',
	'1': 'b',
	'2': 'c',
	length: 3
}
console.log(Array.from(arrayLike));		// (3) ["a", "b", "c"]

// 字符串
const text = "hello😎";
console.log(Array.from(text));		// (6) ["h", "e", "l", "l", "o", "😎"]
```

- 扩展运算符背后调用的是遍历器接口(Symbol.iterator)，如果一个对象没有部署这个接口，就无法转换。
- 但是Array.from()方法还支持类数组对象，所谓类数组对象就是必须有length属性。
- 因此所有有length属性的对象都可以通过Array.from()方法转为数组，但此时扩展运算符就无法转换

## 分割表情符
```js
    let 字符 = "💟💯💢💫💥💦💨💣💤🏻🏼🏽⚓♠️♥️♦️♣️🀄💹💱💲🔗🏧🚮🚰🛅🛄🛂🛃🚾🚼🚻🚺🚹♿🛐🕉️⚛️✡️☸️☯️✝️☦️☪️☮️🕎🔯♈⛎♓♒♑♐♏♎♍♌♋♊♉🔴🔵⚫⚪⬛⬜◼️◻️◾◽▪️▫️🔶🔷🔸🔹🔺🔻💠🔘👾💭💅👂🧠👀👁️🛀🛌👣🥄🔪🏺🗺️🗾🎠☔☂️🌂🌡️🕰️⏰⏰⌚⏳⌛🛸🛎️🚀🛰️🎪💈💈🎢🎡⛱️⚡🎃🎄🎆🎇🎈🎉🎉🎏🎐🎑🎁🎀🎗️🎟️🎫🧦🧤🧥🧣👖👕👔👓🎨🎨🖼️🎭🎴🎴🎰🕹️🎮🔮👗👘👙👚👛👜👝👞👟👠👢👡👑👒🎩🎓🧢🎙️🎶🎵🎼🔕🔔📯📣📢🔊🔉🔈🔇💎💍💄📿🎚️🎛️🎤🎧📻🎷🎸🎹🎹🎻🥁📱📲☎️📞📟📠💟💯💢💫💥💦💨💣💤🏻🏼🏽⚓♠️♥️♦️♣️🀄💹💱💲🔗🏧🚮🚰🛅🛄🛂🛃🚾🚼🚻🚺🚹♿🛐🕉️⚛️✡️☸️☯️✝️☦️☪️☮️🕎🔯♈⛎♓♒♑♐♏♎♍♌♋♊♉🔴🔵⚫⚪⬛⬜◼️◻️◾◽▪️▫️🔶🔷🔸🔹🔺🔻💠🔘";
    let arr = Array.from(字符);
    let arr2 = [];
    for (let i = 0; i < arr.length; i++) {
        logd(arr[i]);
		//  去掉特殊字符 注意双引号里是特殊字符！！！！
        if(arr[i] !==  ️"️️"){
            arr2.push(arr[i])
        }
    }
    logd("------------------------------------------------------");
    for (let i = 0; i <arr2.length; i++) {
        logd(arr2[i]);
    }
```
部分运行结果
```java
[2021-08-12 02:17:35.449]【远程设备】(js/main.js#53 )💟
[2021-08-12 02:17:35.450]【远程设备】(js/main.js#53 )💯
[2021-08-12 02:17:35.450]【远程设备】(js/main.js#53 )💢
[2021-08-12 02:17:35.451]【远程设备】(js/main.js#53 )💫
[2021-08-12 02:17:35.452]【远程设备】(js/main.js#53 )💥
[2021-08-12 02:17:35.453]【远程设备】(js/main.js#53 )💦
[2021-08-12 02:17:35.453]【远程设备】(js/main.js#53 )💨
[2021-08-12 02:17:35.455]【远程设备】(js/main.js#53 )💣
[2021-08-12 02:17:35.455]【远程设备】(js/main.js#53 )💤
[2021-08-12 02:17:35.456]【远程设备】(js/main.js#53 )🏻
[2021-08-12 02:17:35.456]【远程设备】(js/main.js#53 )🏼
[2021-08-12 02:17:35.457]【远程设备】(js/main.js#53 )🏽
[2021-08-12 02:17:35.457]【远程设备】(js/main.js#53 )⚓
[2021-08-12 02:17:35.457]【远程设备】(js/main.js#53 )♠
[2021-08-12 02:17:35.457]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.458]【远程设备】(js/main.js#53 )♥
[2021-08-12 02:17:35.459]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.459]【远程设备】(js/main.js#53 )♦
[2021-08-12 02:17:35.463]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.463]【远程设备】(js/main.js#53 )♣
[2021-08-12 02:17:35.463]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.463]【远程设备】(js/main.js#53 )🀄
[2021-08-12 02:17:35.463]【远程设备】(js/main.js#53 )💹
[2021-08-12 02:17:35.464]【远程设备】(js/main.js#53 )💱
[2021-08-12 02:17:35.464]【远程设备】(js/main.js#53 )💲
[2021-08-12 02:17:35.464]【远程设备】(js/main.js#53 )🔗
[2021-08-12 02:17:35.465]【远程设备】(js/main.js#53 )🏧
[2021-08-12 02:17:35.465]【远程设备】(js/main.js#53 )🚮
[2021-08-12 02:17:35.465]【远程设备】(js/main.js#53 )🚰
[2021-08-12 02:17:35.467]【远程设备】(js/main.js#53 )🛅
[2021-08-12 02:17:35.467]【远程设备】(js/main.js#53 )🛄
[2021-08-12 02:17:35.468]【远程设备】(js/main.js#53 )🛂
[2021-08-12 02:17:35.468]【远程设备】(js/main.js#53 )🛃
[2021-08-12 02:17:35.469]【远程设备】(js/main.js#53 )🚾
[2021-08-12 02:17:35.469]【远程设备】(js/main.js#53 )🚼
[2021-08-12 02:17:35.469]【远程设备】(js/main.js#53 )🚻
[2021-08-12 02:17:35.470]【远程设备】(js/main.js#53 )🚺
[2021-08-12 02:17:35.470]【远程设备】(js/main.js#53 )🚹
[2021-08-12 02:17:35.470]【远程设备】(js/main.js#53 )♿
[2021-08-12 02:17:35.470]【远程设备】(js/main.js#53 )🛐
[2021-08-12 02:17:35.471]【远程设备】(js/main.js#53 )🕉
[2021-08-12 02:17:35.472]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.472]【远程设备】(js/main.js#53 )⚛
[2021-08-12 02:17:35.473]【远程设备】(js/main.js#53 )️
[2021-08-12 02:17:35.645]【远程设备】(js/main.js#58 )------------------------------------------------------
//  下面是最终处理结果 去掉了 空字符串
[2021-08-12 02:17:35.645]【远程设备】(js/main.js#60 )💟
[2021-08-12 02:17:35.645]【远程设备】(js/main.js#60 )💯
[2021-08-12 02:17:35.646]【远程设备】(js/main.js#60 )💢
[2021-08-12 02:17:35.646]【远程设备】(js/main.js#60 )💫
[2021-08-12 02:17:35.647]【远程设备】(js/main.js#60 )💥
[2021-08-12 02:17:35.648]【远程设备】(js/main.js#60 )💦
[2021-08-12 02:17:35.648]【远程设备】(js/main.js#60 )💨
[2021-08-12 02:17:35.649]【远程设备】(js/main.js#60 )💣
[2021-08-12 02:17:35.649]【远程设备】(js/main.js#60 )💤
[2021-08-12 02:17:35.650]【远程设备】(js/main.js#60 )🏻
[2021-08-12 02:17:35.650]【远程设备】(js/main.js#60 )🏼
[2021-08-12 02:17:35.651]【远程设备】(js/main.js#60 )🏽
[2021-08-12 02:17:35.651]【远程设备】(js/main.js#60 )⚓
[2021-08-12 02:17:35.652]【远程设备】(js/main.js#60 )♠
[2021-08-12 02:17:35.652]【远程设备】(js/main.js#60 )♥
[2021-08-12 02:17:35.653]【远程设备】(js/main.js#60 )♦
[2021-08-12 02:17:35.654]【远程设备】(js/main.js#60 )♣
[2021-08-12 02:17:35.654]【远程设备】(js/main.js#60 )🀄
[2021-08-12 02:17:35.655]【远程设备】(js/main.js#60 )💹
[2021-08-12 02:17:35.655]【远程设备】(js/main.js#60 )💱
[2021-08-12 02:17:35.656]【远程设备】(js/main.js#60 )💲
[2021-08-12 02:17:35.657]【远程设备】(js/main.js#60 )🔗
[2021-08-12 02:17:35.657]【远程设备】(js/main.js#60 )🏧
[2021-08-12 02:17:35.658]【远程设备】(js/main.js#60 )🚮
[2021-08-12 02:17:35.658]【远程设备】(js/main.js#60 )🚰
[2021-08-12 02:17:35.659]【远程设备】(js/main.js#60 )🛅
[2021-08-12 02:17:35.660]【远程设备】(js/main.js#60 )🛄
[2021-08-12 02:17:35.660]【远程设备】(js/main.js#60 )🛂
[2021-08-12 02:17:35.661]【远程设备】(js/main.js#60 )🛃
[2021-08-12 02:17:35.661]【远程设备】(js/main.js#60 )🚾
[2021-08-12 02:17:35.662]【远程设备】(js/main.js#60 )🚼
[2021-08-12 02:17:35.663]【远程设备】(js/main.js#60 )🚻
[2021-08-12 02:17:35.663]【远程设备】(js/main.js#60 )🚺
[2021-08-12 02:17:35.664]【远程设备】(js/main.js#60 )🚹
[2021-08-12 02:17:35.664]【远程设备】(js/main.js#60 )♿
[2021-08-12 02:17:35.665]【远程设备】(js/main.js#60 )🛐
[2021-08-12 02:17:35.665]【远程设备】(js/main.js#60 )🕉
[2021-08-12 02:17:35.666]【远程设备】(js/main.js#60 )⚛
[2021-08-12 02:17:35.666]【远程设备】(js/main.js#60 )✡
[2021-08-12 02:17:35.667]【远程设备】(js/main.js#60 )☸
[2021-08-12 02:17:35.668]【远程设备】(js/main.js#60 )☯
[2021-08-12 02:17:35.668]【远程设备】(js/main.js#60 )✝
[2021-08-12 02:17:35.668]【远程设备】(js/main.js#60 )☦
[2021-08-12 02:17:35.668]【远程设备】(js/main.js#60 )☪
[2021-08-12 02:17:35.669]【远程设备】(js/main.js#60 )☮
[2021-08-12 02:17:35.670]【远程设备】(js/main.js#60 )🕎
[2021-08-12 02:17:35.670]【远程设备】(js/main.js#60 )🔯
[2021-08-12 02:17:35.671]【远程设备】(js/main.js#60 )♈
[2021-08-12 02:17:35.672]【远程设备】(js/main.js#60 )⛎
[2021-08-12 02:17:35.672]【远程设备】(js/main.js#60 )♓
[2021-08-12 02:17:35.673]【远程设备】(js/main.js#60 )♒
[2021-08-12 02:17:35.673]【远程设备】(js/main.js#60 )♑
[2021-08-12 02:17:35.674]【远程设备】(js/main.js#60 )♐
[2021-08-12 02:17:35.675]【远程设备】(js/main.js#60 )♏
[2021-08-12 02:17:35.675]【远程设备】(js/main.js#60 )♎
```
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JavaScript 字符串 转数组

JavaScript 字符串转数组