Pushing in an array if the condition is true-CodePudding

I have the following chart:

const array = [
  ["one", true],
  ["two", false],
  ["three", false],
  ["four", true]
]

I would like to see this variable added when the value is true:

const add = ["ok"]

So that in the end it looks like this:

[
  [ 'one', true, 'ok' ],
  [ 'two', false ],
  [ 'three', false ],
  [ 'four', true, 'ok' ],
]

Currently, I'm trying the .map method:

const testBoolean = array.map(el => {
  if (el[1] === true){
    array.push(add)
  }
})

console.log(array)

But I don't know where to tell it to push to line 3...

Thanks for your help, and have a nice day :) !

CodePudding user response：

Never use map if you mean forEach. Only use map if you need the resulting array - in this case testBoolean would be a map

You want this

const array = [
  ["one", true],
  ["two", false],
  ["three", false],
  ["four", true]
]
const add = ["ok"]

array.forEach(el => {
  if (el[1] === true) {  // or just if (el[1]) if you are sure it is always a boolean
    el.push(...add) // or add[0]
  }
})

console.log(array)

CodePudding user response：

simply loop through array using forEach and check if the first index is true. For boolean values you don't need to compare it with true or false.

const array = [
  ["one", true],
  ["two", false],
  ["three", false],
  ["four", true]
];

const add = ["ok"]

array.forEach(item => {
    if(item[1]){
    item.push(...add);
  }
});

console.log(array)

documentation for forEach

CodePudding user response：

Thank you so much :) ! It works !!!