Truncate 2d arrays of numbers-CodePudding

I am new to JavaScript and I wanted to truncate numbers (23.123) to 23.

arr = [
[1.05, 2.0123, 3.123, 4.123],
[1.05, 2.0123, 3.123, 4.123], 
[1.05, 2.0123, 3.123, 4.123]
]

I tried Math.trunc and even with lodash (_.toInteger) but was not getting results. I may have screwed in logic.

I need output like this.

output = [
[1, 2, 3, 4],
[1, 2, 3, 4],
[1, 2, 3, 4],
]

I just wanna know how can we achieve this.

CodePudding user response：

you can use toFixed()

const arr = [
  [1.05, 2.0123, 3.123, 4.123],
  [1.05, 2.0123, 3.123, 4.123], 
  [1.05, 2.0123, 3.123, 4.123]
]

const nestedArr = arr.map(nestedArr => nestedArr.map(item => item.toFixed(0)))
console.log(nestedArr)

CodePudding user response：

Maybe this will help you.

const arr = [
  [1.05, 2.0123, 3.123, 4.123],
  [1.05, 2.0123, 3.123, 4.123],
  [1.05, 2.0123, 3.123, 4.123]
]

const allEls = arr.map((el) => {
  return el.map((num) => Math.trunc(num))
})

console.log(allEls)

CodePudding user response：

I believe you should use Math.trunc function

let arr = [
[1.05, 2.0123, 3.123, 4.123],
[1.05, 2.0123, 3.123, 4.123], 
[1.05, 2.0123, 3.123, 4.123]
];    
for(let i=0;i<arr.length;i  ){
    for(let j=0;j<arr[i].length;j  ){
        arr[i][j] = Math.trunc(arr[i][j]);
    }
}
console.log(arr);

CodePudding user response：

Have you tried the method parseInt ?

var arr = [
[1.05, 2.0123, 3.123, 4.123],
[1.05, 2.0123, 3.123, 4.123], 
[1.05, 2.0123, 3.123, 4.123]
];

for(var i = 0; i < arr.length; i  )
{
    var newArray = arr[i];
  
  for(var bis = 0; bis < newArray.length; bis  )
  {
    console.log(parseInt(newArray[bis]));
  }
}

See the doc : https://www.w3schools.com/jsref/jsref_parseint.asp

Hope this helps you.