加入几个字符串

Question

我有这样的3（或n）个字符串，总长度相同：

abc

将这些字符串组合在一起的最佳方式是什么：

"abc                            "
"         xy                    "
"         xy   ----             "
"              ----             "
"              ----     xcv     "

Answer 1

使用Array#reduce和Array#forEach你可以做这样的事情

var a = "abc                            ",
  b = "         xy                    ",
  c = "         xy   ----             ",
  d = "              ----             ",
  e = "              ----     xcv     ";

var res = [
  a.split(''), // split intosingle character array
  b.split(''),
  c.split(''),
  d.split(''),
  e.split('')
].reduce(function(arr, v) { // iterate and generate character array
  // iterate each array element and set arr value if non space character found
  v.forEach(function(v1, i) {
    if (v1.trim().length)
      arr[i] = v1;
  })
  // return updated array
  return arr;
// set initial value as an array of string size  and fill it with ' '(space) 
}, new Array(a.length).fill(' ')).join(''); // join the result array to generate the string

console.log(res);