使用JavaScript合并数组中的对象

Question

first post, new to programming, excited to learn!

The Problem: How do I merge all the objects (strings) into a single array?

EX:

var myStrings = ["How", "", "do", "", "I", "", "merge", "", "these?"]

Desired result = ["How do I merge these?"]

My research: I've tried .join('') but that gives:

Not desired result = How,,do,,I,,merge,,these?

Thank you for helping a newbie!

Answer 1

You could filter with Array#filter for truthy values (like not empty strings)

 value Boolean 'abc' -> true '' -> false 

and the join with ' ' . Then take it as an element of a new array.

 var myStrings = ["How", "", "do", "", "I", "", "merge", "", "these?"], result = [myStrings.filter(function (a) { return a; }).join(' ')]; console.log(result); 

Answer 2

You can do it by,

var myStrings = ["How", "", "do", "", "I", "", "merge", "", "these?"];
var result = [myStrings.join(" ").replace(/\s\s/g, " ")];
console.log(result); // ["How do I merge these?"]

Try to join the array by a single space as I given above. And replaces the double spaces with a single one. This has to be done since you are having empty strings in your array.

Answer 3

var myStrings = ["How", "", "do", "", "I", "", "merge", "", "these?"]

myStrings.join('').split(',,').join(' ');

Answer 4

You can use .forEach() to iterate array, if item is not empty string concatenate item to new string, else concatenate space character " " to new string.

var res = [""];
myStrings.forEach(function(str) {res[0] += str !== "" ? str : " ";});