JS how to convert a string into an array object

js How to convert a string into an array object

// The data format is as follows ：
list: [
		  {
    
		    radio: "",
		    formInline: "1,2,3,4", // Process this string 
		  },
		  {
    
		    radio: "",
		    formInline: "1,2,3,4",
		  },
],
// First cycle list
let str = this.list;
for(var i = 0;i<str.length;i++){
    
	let arr = str[i].formInline.split(",").map((item)=>{
    
		let obj  = {
    };
		obj.name = item;
		return obj;
	})
	this.list[i].formInline = arr; // take arr Assign to array 
	console.log(this.list[i].formInline);
}

• split() Method is used to put a A string is split into an array of strings . grammar ： stringObject.split(separator,howmany)
• separator It's necessary . String or regular expression , Split from where specified by this parameter stringObject.
• howmany Optional . This parameter specifies the maximum length of the returned array . If this parameter is set , No more substrings will be returned than the array specified by this parameter . If the parameter is not set , The entire string will be split , Regardless of its length .

"2:3:4:5".split(":")  // Will return ["2", "3", "4", "5"]
"|a|b|c".split("|")   // Will return ["", "a", "b", "c"]

map() Method to create a new array , The result is that each element in the array is the return value after a call to the supplied function .

const array1 = [1, 4, 9, 16];
// pass a function to map
const map1 = array1.map(x => x * 2);
console.log(map1);
// Results output ：[2, 8, 18, 32]

The same is true if it is a string

let str = "1,2,3,4";
let arr=str.split(',').map(item=>{
    
	let obj = {
    };
	obj.name = item;
	return obj
})
console.log(arr)

give the result as follows ：