Counting words in string

Question

I was trying to count words in a text in this way  function WordCount str      var totalSoFar   0    for  var i   0  i  lt  WordCount length  i        if  str i       quot   quot        if a space is found in str       totalSoFar    1     add 1 to total so far       totalsoFar    1     add 1 to totalsoFar to account for extra space since 1 space   2 words    console log WordCount  quot Random String quot      I think I have got this down pretty well  except I think that the if statement is wrong  The part that checks if str i  contains a space and adds 1  Edit  I found out  thanks to Blender  that I can do this with a lot less code  function WordCount str       return str split  quot   quot   length     console log WordCount  quot hello world quot

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I m not sure if this has been said previously  or if it s what is needed here  but couldn t you make the string an array and then find the length   let randomString    Random String    let stringWords   randomString split       console log stringWords length

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For those who want to use Lodash can use the   words function    x000D   x000D  var str    Random String   x000D  var wordCount     size   words str    x000D  console log wordCount   x000D   lt script src  https   cdnjs cloudflare com ajax libs lodash js 4 17 11 lodash min js  gt  lt  script gt  x000D   x000D   x000D

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This will handle all of the cases and is as efficient as possible   You don t want split      unless you know beforehand that there are no spaces of greater length than one    var quote    Of all the talents bestowed upon men                 none is so precious as the gift of oratory                 He who enjoys it wields a power more durable than that of a great king                 He is an independent force in the world                 Abandoned by his party  betrayed by his friends  stripped of his offices                 whoever can command this power is still formidable     function wordCount text           const words   text trim   split   s  g      if   words 0  length        return 0         return words length      console log WordCount quote     59 console log WordCount  f      1 console log WordCount    f       1 console log WordCount           0

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function WordCount str        var totalSoFar   0      for  var i   1  i  lt  str length  i              if  str i                         totalSoFar                         return totalSoFar     console log WordCount  hi my name is raj

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One more way to count words in a string  This code counts words that contain only alphanumeric characters and              -       chars   function countWords str      var matches   str match    w d      -   gi     return matches   matches length   0

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There may be a more efficient way to do this  but this is what has worked for me    function countWords passedString     passedString   passedString replace     s     s    gi         passedString   passedString replace   s s  g           passedString   passedString replace    g            passedString   passedString replace    g          passedString   passedString replace     g            passedString   passedString replace     g            passedString   passedString replace    g          passedString   passedString replace    g          passedString   passedString replace   n g            passedString   passedString replace     g           passedString   passedString replace         g          passedString   passedString replace         g          passedString   passedString replace        g          passedString   passedString replace      2   gi          var countWordsBySpaces   passedString split      length     return countWordsBySpaces        its able to recognise all of the following as separate words   abc abc   2 words   abc abc abc   3 words  works with forward and backward slashes    abc abc   2 words   abc abc abc   3 words   abc abc   2 words    some other suggestions I ve tried count each example above as only 1 x word  it also    ignores all leading and trailing white spaces counts a single-letter followed by a new line  as a word - which I ve found some of the suggestions given on this page don t count  for example  a a a a a sometimes gets counted as 0 x words  and other functions only count it as 1 x word  instead of 5 x words    if anyone has any ideas on how to improve it  or cleaner   more efficient - then please add you 2 cents   Hope This Helps Someone out

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I think this answer will give all the solutions for    Number of characters in a given string Number of words in a given string Number of lines in a given string    x000D   x000D   function NumberOf      x000D     var string    Write a piece of code in any language of your choice that computes the total number of characters  words and lines in a given text   n This is second line   n This is third line    x000D   x000D     var length   string length    No of characters x000D     var words   string match   w  g  length    No of words x000D     var lines   string split   r n  r  n   length     No of lines x000D   x000D     console log  Number of characters   length   x000D     console log  Number of words   words   x000D     console log  Number of lines   lines   x000D   x000D   x000D    x000D   x000D  NumberOf    x000D   x000D   x000D     First you need to find length of the given string by string length Then you can find number of words by matching them with string string match   w  g  length Finally you can split each line like this string length   r n  r  n   length   I hope this can help those who are searching for these 3 answers

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I think this method is more than you want  var getWordCount   function v       var matches   v match   S  g        return matches matches length 0

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let leng   yourString split      filter a   gt  a trim   length  gt  0  length

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After cleaning the string  you can match non-whitespace characters or word-boundaries   Here are two simple regular expressions to capture words in a string    Sequence of non-white-space characters    S  g Valid characters between word boundaries    b a-z d   b g   The example below shows how to retrieve the word count from a string  by using these capturing patterns    x000D   x000D    Redirect console output to HTML   document body innerHTML    console log function s  document body innerHTML  s   n     x000D    String format   String format   String format function f  return function a  return f replace     d    g function m n  return undefined   typeof a n  a n  m       slice call arguments 1      x000D   x000D       IGNORE CODE ABOVE   x000D                         x000D   x000D     Clean and match sub-strings in a string  x000D  function extractSubstr str  regexp    x000D      return str replace     w s    g      x000D           replace   s  g       x000D           toLowerCase   match regexp         x000D    x000D   x000D     Find words by searching for sequences of non-whitespace characters  x000D  function getWordsByNonWhiteSpace str    x000D      return extractSubstr str    S  g   x000D    x000D   x000D     Find words by searching for valid characters between word-boundaries  x000D  function getWordsByWordBoundaries str    x000D      return extractSubstr str    b a-z d   b g   x000D    x000D   x000D     Example of usage  x000D  var edisonQuote    I have not failed  I ve just found 10 000 ways that won t work    x000D  var words1   getWordsByNonWhiteSpace edisonQuote   x000D  var words2   getWordsByWordBoundaries edisonQuote   x000D   x000D  console log String format    0   - Thomas Edison n nWord count via  n   edisonQuote    x000D  console log String format   - non-white-space    0     1     words1 length  words1 join          x000D  console log String format   - word-boundaries    0     1     words2 length  words2 join          x000D  body   font-family  monospace  white-space  pre  font-size  11px    x000D   x000D   x000D      Finding Unique Words  You could also create a mapping of words to get unique counts    x000D   x000D  function cleanString str    x000D      return str replace     w s    g      x000D           replace   s  g       x000D           toLowerCase    x000D    x000D   x000D  function extractSubstr str  regexp    x000D      return cleanString str  match regexp         x000D    x000D   x000D  function getWordsByNonWhiteSpace str    x000D      return extractSubstr str    S  g   x000D    x000D   x000D  function getWordsByWordBoundaries str    x000D      return extractSubstr str    b a-z d   b g   x000D    x000D   x000D  function wordMap str    x000D      return getWordsByWordBoundaries str  reduce function map  word    x000D          map word     map word     0    1  x000D          return map  x000D              x000D    x000D   x000D  function mapToTuples map    x000D      return Object keys map  map function key    x000D          return   key  map key     x000D          x000D    x000D   x000D  function mapToSortedTuples map  sortFn  sortOrder    x000D      return mapToTuples map  sort function a  b    x000D          return sortFn call undefined  a  b  sortOrder   x000D          x000D    x000D   x000D  function countWords str    x000D      return getWordsByWordBoundaries str  length  x000D    x000D   x000D  function wordFrequency str    x000D      return mapToSortedTuples wordMap str   function a  b  order    x000D          if  b 1   gt  a 1     x000D              return order 1    -1  x000D            else if  a 1   gt  b 1     x000D              return order 1    1  x000D            else   x000D              return order 0     a 0   lt  b 0    -1    a 0   gt  b 0    1   0    x000D            x000D          1  -1    x000D    x000D   x000D  function printTuples tuples    x000D      return tuples map function tuple    x000D          return padStr tuple 0        12  1      - gt      tuple 1   x000D         join   n    x000D    x000D   x000D  function padStr str  ch  width  dir     x000D      return  width  lt   str length   str   padStr dir  lt  0   ch   str   str   ch  ch  width  dir   substr 0  width   x000D    x000D   x000D  function toTable data  headers    x000D      return     lt table gt    append     lt thead gt    append     lt tr gt    append headers map function header    x000D          return     lt th gt    html header   x000D            append     lt tbody gt    append data map function row    x000D          return     lt tr gt    append row map function cell    x000D              return     lt td gt    html cell   x000D               x000D            x000D    x000D   x000D  function addRowsBefore table  data    x000D      table find  tbody   prepend data map function row    x000D          return     lt tr gt    append row map function cell    x000D              return     lt td gt    html cell   x000D               x000D           x000D      return table  x000D    x000D   x000D    function     x000D          countWordsBtn   on  click   function e    x000D          var str       wordsTxtAra   val    x000D          var wordFreq   wordFrequency str   x000D          var wordCount   countWords str   x000D          var uniqueWords   wordFreq length  x000D          var summaryData     x000D                 TOTAL   wordCount    x000D                 UNIQUE   uniqueWords   x000D             x000D          var table   toTable wordFreq    Word    Frequency     x000D          addRowsBefore table  summaryData   x000D              wordFreq   html table   x000D          x000D      x000D  table   x000D      border-collapse  collapse  x000D      table-layout  fixed  x000D      width  200px  x000D      font-family  monospace  x000D    x000D  thead   x000D      border-bottom   000 3px double   x000D    x000D  table  td  th   x000D      border   000 1px solid  x000D    x000D  td  th   x000D      padding  2px  x000D      width  100px  x000D      overflow  hidden  x000D    x000D   x000D  textarea  input type  button    table   x000D      margin  4px  x000D      padding  2px  x000D    x000D   lt script src  https   ajax googleapis com ajax libs jquery 1 11 1 jquery min js  gt  lt  script gt  x000D   x000D   lt h1 gt Word Frequency lt  h1 gt  x000D   lt textarea id  wordsTxtAra  cols  60  rows  8  gt Four score and seven years ago our fathers brought forth on this continent  a new nation  conceived in Liberty  and dedicated to the proposition that all men are created equal  x000D   x000D  Now we are engaged in a great civil war  testing whether that nation  or any nation so conceived and so dedicated  can long endure  We are met on a great battle-field of that war  We have come to dedicate a portion of that field  as a final resting place for those who here gave their lives that that nation might live  It is altogether fitting and proper that we should do this  x000D   x000D  But  in a larger sense  we can not dedicate -- we can not consecrate -- we can not hallow -- this ground  The brave men  living and dead  who struggled here  have consecrated it  far above our poor power to add or detract  The world will little note  nor long remember what we say here  but it can never forget what they did here  It is for us the living  rather  to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced  It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation  under God  shall have a new birth of freedom -- and that government of the people  by the people  for the people  shall not perish from the earth  lt  textarea gt  lt br   gt  x000D   lt input type  button  id  countWordsBtn  value  Count Words    gt  x000D   lt div id  wordFreq  gt  lt  div gt  x000D   x000D   x000D

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Use square brackets  not parentheses   str i            Or charAt   str charAt i            You could also do it with  split     return str split      length

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Accuracy is also important   What option 3 does is basically replace all the but any whitespaces with a  1 and then evaluates this to count up the 1 s giving you the word count   It s the most accurate and fastest method of the four that I ve done here   Please note it is slower than return str split      length  but it s accurate when compared to Microsoft Word   See file ops s and returned word count below   Here s a link to run this bench test  https   jsbench me ztk2t3q3w5 1   x000D   x000D     This is the fastest at 111 037 ops s   2 86  fastest x000D  var str    All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy    x000D  function WordCount str    x000D    return str split      length  x000D    x000D  console log WordCount str    x000D     Returns 241 words  Not the same as Microsoft Word count  of by one  x000D   x000D     This is the 2nd fastest at 46 835 ops s   1 76  57 82  slower x000D  var str    All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy    x000D  function WordCount str    x000D    return str split      W  S    length  x000D    x000D  console log WordCount str    x000D     Returns 241 words  Not the same as Microsoft Word count  of by one  x000D   x000D     This is the 3rd fastest at 37 121 ops s   1 18  66 57  slower x000D  var str    All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy    x000D  function countWords str    x000D    var str   str replace   S  g    1    x000D    return eval str   x000D    x000D  console log countWords str    x000D     Returns 240 words  Same as Microsoft Word count  x000D   x000D     This is the slowest at 89 ops s 17 270 ops s   2 29  84 45  slower x000D  var str    All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy  All work and no play makes Jack a dull boy    x000D  function countWords str    x000D    var str   str replace      W  S  g  1   replace   s  g      x000D    return str lastIndexOf      x000D    x000D  console log countWords str    x000D     Returns 240 words  Same as Microsoft Word count  x000D   x000D   x000D

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String prototype match returns an array  we can then check the length    I find this method to be most descriptive  var str    one two three four five    str match   w  g  length

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lt textarea name  myMessage  onkeyup  wordcount this value   gt  lt  textarea gt   lt script type  text javascript  gt  var cnt  function wordcount count    var words   count split   s    cnt   words length  var ele   document getElementById  w count    ele value   cnt    document write   lt input type text id w count size 4 readonly gt      lt  script gt

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I know its late but this regex should solve your problem  This will match and return the number of words in your string  Rather then the one you marked as a solution  which would count space-space-word as 2 words even though its really just 1 word   function countWords str        var matches   str match   S  g       return matches   matches length   0

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You got some mistakes in your code   function WordCount str        var totalSoFar   0      for  var i   0  i  lt  str length  i              if  str i                         totalSoFar    1                      return totalSoFar   1     you need to return something    console log WordCount  Random String       There is another easy way using regular expressions     text split   b   length - 1    2   The exact value can differ about 1 word  but it also counts word borders without space  for example  word-word word   And it doesn t count words that don t contain letters or numbers

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The easiest way I ve find so far is to use a regex with split    x000D   x000D  var calculate   function     x000D    var string   document getElementById  input   value  x000D    var length   string split     s     length - 1  x000D    document getElementById  count   innerHTML   length  x000D     x000D   lt textarea id  input  gt My super text that does 7 words  lt  textarea gt  x000D   lt button onclick  calculate    gt Calculate lt  button gt  x000D   lt span id  count  gt 7 lt  span gt  words x000D   x000D   x000D

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The answer given by  7-isnotbad is extremely close  but doesn t count single-word lines  Here s the fix  which seems to account for every possible combination of words  spaces and newlines   function countWords s       s   s replace   n g          newlines to space     s   s replace     s     s    gi         remove spaces from start   end     s   s replace      2   gi          2 or more spaces to 1     return s split      length

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Here s my approach  which simply splits a string by spaces  then for loops the array and increases the count if the array i  matches a given regex pattern       function wordCount str            var stringArray   str split               var count   0          for  var i   0  i  lt  stringArray length  i                  var word   stringArray i               if    A-Za-z   test word                     count                                   return count         Invoked like so    var str    testing strings here s a string --             random characters     end of string   wordCount str     added extra characters  amp  spaces to show accuracy of function   The str above returns 10  which is correct

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If you want to count specific words function countWholeWords text  keyword        const times   text match new RegExp    b  keyword   b    gi          if  times            console log    keyword  occurs   times length  times          else           console log keyword    quot  does not occurs quot             const text     In a professional context it often happens that private or corporate clients corder a publication to be  made and presented with the actual content still not being ready  Think of a news blog that s  filled with content hourly on the day of going live  However  reviewers tend to be distracted  by comprehensible content  say  a random text copied from a newspaper or the internet     const wordsYouAreLookingFor     quot random quot    quot cat quot    quot content quot    quot reviewers quot    quot dog quot    quot with quot    wordsYouAreLookingFor forEach  keyword    gt  countWholeWords text  keyword         random occurs 1 times    cat does not occurs    content occurs 3 times    reviewers occurs 1 times    dog does not occurs    with occurs 2 times

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Try these before reinventing the wheels  from Count number of words in string using JavaScript  function countWords str      return str trim   split   s    length      from http   www mediacollege com internet javascript text count-words html  function countWords s       s   s replace     s     s    gi       exclude  start and end white-space     s   s replace      2   gi        2 or more space to 1     s   s replace   n     n       exclude newline with a start spacing     return s split      filter function str  return str        length        return s split      filter String  length  - this can also be used     from Use JavaScript to count words in a string  WITHOUT using a regex  - this will be the best approach  function WordCount str         return str split                   filter function n    return n                       length         Notes From Author       You can adapt this script to count words in whichever way you like     The important part is s split      length     this counts the   spaces        The script attempts to remove all extra spaces  double spaces etc  before counting        If the text contains two words without a space between them  it will count them as one word  e g   First sentence    Start of next sentence

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function countWords str        var regEx        u0000- u007F   w   g        return str match regEx  length      Explanation         u0000- u007F   w  matches word characters - which is great -  regex does the heavy lifting for us   This pattern is based on the following SO answer  https   stackoverflow com a 35743562 1806956 by  Landeeyo      matches the whole string of the previously specified word characters - so we basically group word characters    g means it keeps looking till the end   str match regEx  returns an array of the found words - so we count its length

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function totalWordCount       var str   My life is happy    var totalSoFar   0     for  var i   0  i  lt  str length  i        if  str i                   totalSoFar   totalSoFar 1        totalSoFar   totalSoFar  1     return totalSoFar    console log totalWordCount

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Here s a function that counts number of words in an HTML code     this  val        replace     amp nbsp     lt    gt    gt     g         remove html spaces and tags      replace   s  g          merge multiple spaces into one      trim      trim ending and beginning spaces  yes  this is needed       match   s g     find all spaces by regex      length    get amount of matches

[javascript] Counting words in string

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