published: 03 Sep 2022
2 min read
How to trim all strings in an array using JavaScript
To trim all strings in an array using JavaScript:
- Use the
Array.map()method to iterate over all elements in an array. - Use the
trim()method to remove whitespace from both sides of a string in each iteration. - The
map()method will return a new array containing strings with no whitespace.
const arr = [' zero ', ' one ', ' two ']
const updated = arr.map(item => item.trim())
console.log(updated)
// [ 'zero', 'one', 'two' ]
The Array.map() method invokes the given callback function for each element in the array. It does not mutate the original array. Instead, it creates a new array using the results of the callback function.
The trim() function removes leading and trailing whitespace from a string. It also does not mutate the original string.
If you need to update the array in place, use the Array.forEach() method instead:
const arr = [' zero ', ' one ', ' two ']
arr.forEach((item, index) => {
arr[index] = item.trim()
})
console.log(arr)
// [ 'zero', 'one', 'two' ]
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How to trim all strings in an array using JavaScript
To trim all strings in an array using JavaScript:
- Use the
Array.map()method to iterate over all elements in an array. - Use the
trim()method to remove whitespace from both sides of a string in each iteration. - The
map()method will return a new array containing strings with no whitespace.
const arr = [' zero ', ' one ', ' two ']
const updated = arr.map(item => item.trim())
console.log(updated)
// [ 'zero', 'one', 'two' ]
The Array.map() method invokes the given callback function for each element in the array. It does not mutate the original array. Instead, it creates a new array using the results of the callback function.
The trim() function removes leading and trailing whitespace from a string. It also does not mutate the original string.
If you need to update the array in place, use the Array.forEach() method instead:
const arr = [' zero ', ' one ', ' two ']
arr.forEach((item, index) => {
arr[index] = item.trim()
})
console.log(arr)
// [ 'zero', 'one', 'two' ]
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