javascript - 如何加入2個有換行符的字符串？

Question

讓我們字符串

ABC 
DEF 

與

123 
456 

加入它，我應該得到

ABC123 
DEF456 

而是我得到

ABC 
DEF123 
456 

我使用的代碼：

的JavaScript：

var strings = "ABC\nDEF" + "123\n456" 
console.log(strings) 

任何幫助這裏？

Answer 1

試試這個：

var str1 = "ABC\nDEF", 
    str2 = "123\n456", 
    str1ToArray = str1.split("\n"), 
    str2ToArray = str2.split("\n"), 
    result = ""; 
for (var i = 0; i < str1ToArray.length; i++) { 
    result += str1ToArray[i]; 
    //Check if the second string was at least as long as the first one 
    if (str2ToArray.length > i) result += str2ToArray[i]; 
    result += "\n"; 
} 
//If the second string was longer than the first one, append its last values 
for (var j = i; j < str2ToArray.length; j++) { 
    result += str2ToArray[j] + "\n"; 
} 
alert(result); 

Answer 2

Math.max()救援：

var i; 
 
var a = 'ABC\nDEF\nGHI'; 
 
var b = '123\n456'; 
 
var aLines = a.split('\n'); 
 
var bLines = b.split('\n'); 
 
var cLines = []; 
 

 
var l = Math.max(
 
    aLines.length, 
 
    bLines.length 
 
); 
 

 
for (i = 0; i < l; i++) { 
 
    cLines.push((aLines[i] || '') + (bLines[i] || '')); 
 
} 
 

 
document.write(
 
    '<pre>' + cLines.join('\n') + '</pre>' 
 
);