Как JS кодом удалить пустые строки?

Question

Для JS в переменной arr задан массив текста:

let arr = ["When I consider every thing that grows",
"",
"Holds in perfection but a little moment,",
"",
"That this huge stage presenteth nought but shows",
"",
"Whereon the stars in secret influence comment;"];

Как удалить из него пустые строки, и чтоб он так и остался в виде массива но только без пустых строк:

Answer 1

C помощью filter например

let arr = ["When I consider every thing that grows",
"",
"Holds in perfection but a little moment,",
"",
"That this huge stage presenteth nought but shows",
"",
"Whereon the stars in secret influence comment;"];

let filteredArr = arr.filter(el => el.trim() !== '');

console.log(filteredArr)

через reduce

let arr = ["When I consider every thing that grows",
"",
"Holds in perfection but a little moment,",
"",
"That this huge stage presenteth nought but shows",
"",
"Whereon the stars in secret influence comment;"];

let filteredArr = arr.reduce((acc, el) => {
  if (el.trim() !== '')
    acc.push(el);
    
  return acc;
}, []);

console.log(filteredArr)

Просто for..of

let arr = ["When I consider every thing that grows",
"",
"Holds in perfection but a little moment,",
"",
"That this huge stage presenteth nought but shows",
"",
"Whereon the stars in secret influence comment;"];

filteredArr = [];

for (el of arr) {
    if (el.trim() !== '')
        filteredArr.push(el);
}


console.log(filteredArr)

Можно изменить тот же самый массив

let arr = ["When I consider every thing that grows",
"",
"Holds in perfection but a little moment,",
"",
"That this huge stage presenteth nought but shows",
"",
"Whereon the stars in secret influence comment;"];

for (let i = arr.length - 1; i > 0; --i) {
    if (arr[i].trim() === '')
        arr.splice(i, 1);
}

console.log(arr)

БЛОГ НА HUSL

Как JS кодом удалить пустые строки?

Ответы (1 шт):