How to change the string in each item of this multidimensional array to Number type

this.array = [
  ["0.6","138"],
  ["0.674","135"],
  ["0.77","81"],
  ["0.8","5"]
];

the es6 method I found is using map,. I do this with the for loop, but I don"t know how to assign the changed value to the original this.array . Wrong report with push. I"m a little dizzy after writing the code all day

for (let index = 0; index < this.array.length; indexPP) {
  const element = this.array[index];
  let arr = element.map(function(i){
     return +i;
  })
  // let myArray= this.array.push(arr)  //
  // this.array= myArray;
}
Mar.12,2021

this.array=this.array.map (v = > v.map (Number))



let myArray = []
for (...) {
  ...
  myArray.push(arr)
}
this.array= myArray;

resolved.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1ea58b2-1d5c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea58b2-1d5c.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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