获取字符串

Question

的第一个字

欧凯这里是我的代码的细节是什么，我试图做的事：

var str = "Hello m|sss sss|mmm ss" 
//Now i separate them by "|" 
    var str1 = str.split('|'); 

//Now i want to get the first word of every split-ed sting parts: 

     for (var i=0;i<codelines.length;i++) 
     { 
    //What to do here to get the first word of every spilt 
     } 

所以，我应该怎么办有：\ 我想要得到的是firstword [0]将给“你好” 和firstword [1]将给予 “SSS” 和firstword [2]将给予 “嗯” 了

Answer 1

分割在一个空格：

var firstWords = []; 
for (var i=0;i<codelines.length;i++) 
{ 
    var words = codelines[i].split(" "); 
    firstWords.push(words[0]); 
} 

或者使用String.prototype.substr()（可能更快）：

var firstWords = []; 
for (var i=0;i<codelines.length;i++) 
{ 
    var codeLine = codelines[i]; 
    var firstWord = codeLine.substr(0, codeLine.indexOf(" ")); 
  firstWords.push(firstWord); 
} 

Answer 2

此代码应该让你的第一个字，

var str = "Hello m|sss sss|mmm ss" 
//Now i separate them by "|" 
var str1 = str.split('|'); 

//Now i want to get the first word of every split-ed sting parts: 

for (var i=0;i<str1.length;i++) 
{ 
    //What to do here to get the first word :(
    var words = str1[i].split(" "); 
    console.log(words[0]); 
} 

Answer 3

var str = "Hello m|sss sss|mmm ss" 
//Now i separate them by "|" 
var str1 = str.split('|'); 

//Now i want to get the first word of every split-ed sting parts: 

for (var i=0;i<str1.length;i++) 
{ 
    //What to do here to get the first word :) 
    var firstWord = str1[i].split(' ')[0]; 
    alert(firstWord); 
} 

Answer 4

我使用这个：开始

function getFirstWord(str) { 
     let spacePosition = str.indexOf(' '); 
     if (spacePosition === -1) 
      return str; 
     else 
      return str.substr(0, spacePosition); 
    }; 

Answer 5

如何使用underscorejs

str = "There are so many places on earth that I want to go, i just dont have time. :(" 
firstWord = _.first(str.split(" ")) 

Answer 6

使用正则表达式

var totalWords = "foo love bar very much."; 

var firstWord = totalWords.replace(/ .*/,''); 

console.log(firstWord);