Convert a string to an array, and transfer the characters in the array to a numeric type-record

1. Convert a string to an array:

	let str ='1326814250918531073,1326814250918531074,1326814250918531075';
	let arr = str.split(',')
	console.log(arr)
	// 结果： ["1326814250918531073", "1326814250918531074", "1326814250918531075"]

2. Transfer the characters in the array to numeric types:

	let str ='1326814250918531073,1326814250918531074,1326814250918531075';
	let arr = str.split(',').map((item) => item * 1)
	console.log(arr) 
	//  结果： [1326814250918531000, 1326814250918531000, 1326814250918531000]

3. Convert the array to a string:

 	let arr = [1326814250918531000, 1326814250918531000, 1326814250918531000]
 	function arrToString(arr) {
    
    
	  let str = []
	  arr.forEach((ele) => {
    
    
	    str.push(ele)
	  })
	 return str.join(',')
	}    
 	console.log(arrToString(arr))
 	//  结果： 1326814250918531000,1326814250918531000,1326814250918531000

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Record, copy and use it next time, it's convenient _