[68] 文本左右对齐

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 1 /**
 2  * @param {string[]} words
 3  * @param {number} maxWidth
 4  * @return {string[]}
 5  */
 6 var fullJustify = function (words, maxWidth) {
 7   const wLen = words.length;
 8   const ans = [];
 9   let arr = [];
10   let surplus = maxWidth;
11   const getString = (array, number) => {
12     const aLen = array.length;
13     if (aLen === 1) {
14       return array[0] + Array(number).fill(' ').join('');
15     }
16     const yu = number % (aLen - 1);
17     const num = (number - yu) / (aLen - 1);
18     for (let i = 0; i < yu; i++) {
19       array[i] = array[i] + ' ';
20     }
21     return array.join(Array(num + 1).fill(' ').join(''));
22   };
23   for (let i = 0; i < wLen; i++) {
24     if (surplus - words[i].length > 0) {
25       arr.push(words[i]);
26       surplus = surplus - words[i].length - 1;
27     } else if (surplus - words[i].length === 0) {
28       arr.push(words[i]);
29       ans.push(arr.join(' '));
30       surplus = maxWidth;
31       arr = [];
32     } else {
33       ans.push(getString(arr, surplus + 1));
34       arr = [words[i]];
35       surplus = maxWidth - words[i].length - 1;
36     }
37   }
38   if (arr.length > 0) {
39     ans.push(arr.join(' ') + Array(surplus + 1).fill(' ').join(''));
40   }
41   return ans;
42 };
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