while循環片

Question

我正在嘗試使用while循環來切出一大塊文本，使每個片段長度不超過995個字符並以句點結尾。我幾乎得到它的工作，除非最後一塊從未被推入陣列。這是爲什麼？

function divideByPunctuation() { 
    var chunkArray = []; 
    var textHunk = prompt(); 
    var textLength = textHunk.length; 
    var currentLoc = 0; 
    var i = 995; 
    while (currentLoc <= textLength) { 
     if (textHunk[i] === ".") { 
      if (i > textLength) { 
       chunkArray.push(textHunk.slice(currentLoc, textLength)); 
       break; 
      } else { 
       chunkArray.push(textHunk.slice(currentLoc, i)); 
       currentLoc += i; 
       i = currentLoc + 995; 
      } 

     } else { 
      i-- 
     } 
    } 
    console.log(chunkArray[0]); 
    console.log(chunkArray[1]); 
    console.log(chunkArray[2]); 
    console.log(chunkArray[3]); 
}; 
divideByPunctuation();​ 

Answer 1

對於這類事情，Javascript有一個很好的內置函數。

a = "Hi there. Here's a test sentence. Here's another one"; 
a.split(". "); 
["Hi there", "Here's a test sentence", "Here's another one"]