Get first word of string

Question

Okay  here is my code with details of what I have tried to do   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  lt  codelines length  i          What to do here to get the first word of every spilt     So what should I do there      What I want to get is     firstword 0  will give  Hello  firstword 1  will give  sss  firstword 2  will give  mmm

User · Answer

I  m using this    function getFirstWord str            let spaceIndex   str indexOf               return spaceIndex     -1   str   str substr 0  spaceIndex

User · Answer

Use regular expression   x000D   x000D  var totalWords    foo love bar very much    x000D   x000D  var firstWord   totalWords replace            x000D   x000D     body   append firstWord   x000D   lt script src  https   cdnjs cloudflare com ajax libs jquery 3 3 1 jquery min js  gt  lt  script gt  x000D   x000D   x000D

User · Answer

How about using underscorejs  str    There are so many places on earth that I want to go  i just dont have time      firstWord     first  str split

User · Answer

Split again by a whitespace   var firstWords       for  var i 0 i lt codelines length i        var words   codelines i  split         firstWords push words 0        Or use String prototype substr    probably faster    var firstWords       for  var i 0 i lt codelines length i        var codeLine   codelines i     var firstWord   codeLine substr 0  codeLine indexOf           firstWords push firstWord

User · Answer

An improvement upon previous answers  working on multi-line or tabbed strings    String prototype firstWord   function   return this replace   s           Or using search and substr   String prototype firstWord   function   let sp this search   s   return sp lt 0 this this substr 0 sp     Or without regex   String prototype firstWord   function      let sps  this indexOf      this indexOf   u000A   this indexOf   u0009        filter  e   gt e   -1     return sps length  this substr 0 Math min    sps     this      Examples    x000D   x000D  String prototype firstWord   function   return this replace   s         x000D  console log  linebreak x000D  example 1  firstWord        - gt  linebreak x000D  console log  space example 2  firstWord        - gt  singleline x000D  console log  tab example 3  firstWord        - gt  tab x000D   x000D   x000D

User · Answer

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 lt str1 length i            What to do here to get the first word        var firstWord   str1 i  split      0       alert firstWord

User · Answer

I m surprised this method hasn t been mentioned   Some string  split      shift      To answer the question directly    let firstWords      let str    Hello m sss sss mmm ss   const codeLines   str split        for  var i   0  i  lt  codeLines length  i        const first   codeLines i  split      shift     firstWords push first

User · Answer

const getFirstWord   string   gt        const firstWord           for  let i   0  i  lt  string length  i    1            if  string i           break          firstWord push string i              return firstWord join         console log getFirstWord  Hello World      or simplify it  const getFirstWord   string   gt        const words   string split           return words 0      console log getFirstWord  Hello World

User · Answer

In modern JS  this is simplified  and you can write something like this    x000D   x000D  const firstWords   str   gt  x000D    str  split         map  s   gt  s  split    s     0   x000D   x000D  const str    Hello m sss sss mmm ss  x000D   x000D  console  log  firstWords  str   x000D   x000D   x000D    We first split the string on the   and then split each string in the resulting array on any white space  keeping only the first one

User · Answer

One of the simplest ways to do this is like this   x000D   x000D  var totalWords    my name is rahul    x000D  var firstWord   totalWords replace             x000D  alert firstWord   x000D  console log firstWord   x000D   x000D   x000D

User · Answer

To get first word of string you can do this  let myStr    quot Hello World quot  let firstWord   myStr split  quot   quot   0

User · Answer

This code should get you the first word   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 lt str1 length i              What to do here to get the first word         var words   str1 i  split            console log words 0

[javascript] Get first word of string

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