Ruby function to remove all white spaces

Question

What is the Ruby function to remove all white spaces  I m looking for something kind of like PHP s trim

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To remove whitespace on both sides   Kind of like php s trim     quot    Hello   quot  strip  To remove all spaces   quot    He    llo   quot  gsub       quot  quot    To remove all whitespace   quot    He tllo   quot  gsub   s    quot  quot

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You Could try this   Some Special Text Values  gsub     space             using  space  removes non breaking space along with regular space

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It s a bit late  but anyone else googling this page might be interested in this version -  If you want to clean up a chunk of pre-formatted text that a user may have cut  amp  pasted into your app somehow  but preserve the word spacing  try this   content          a big nasty          chunk of     something  that s been pasted                        from a webpage       or something        and looks   like      this     content gsub   s         strip     gt   a big nasty chunk of something that s been pasted from a webpage or something and looks like this

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Ruby s  strip method performs the PHP equivalent to trim     To remove all whitespace      leading    trailing     squeeze      strip   gt   leading trailing     Tass made me aware that my original answer removes duplicate letters in succession - YUCK  I ve since switched to the squish method which is smarter about such occurrences if using the Rails framework   require  active support all     leading    trailing     squish   gt   leading trailing      good    men     squish   gt   good men    Cite  http   apidock com rails String squish

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asd sda sda sd  gsub            gt   asdsdasdasd

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1232 23 2 23 232 232  delete        gt   123223223232232    Delete works faster     user         system     total      real gsub  s      0 180000   0 010000   0 190000  0 193014  gsub  s      0 200000   0 000000   0 200000  0 196408  gsub  space  0 220000   0 000000   0 220000  0 222711  gsub  join   0 200000   0 000000   0 200000  0 193478  delete       0 040000   0 000000   0 040000  0 045157

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If you are using Rails ActiveSupport  you can use squish method  It removes white space on both ends of the string and groups multiple white space to single space   For eg     a  b  c   squish   will result to     a b c    Check this reference from api rubyonrails org

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I m a bit late to the game  but I remove trailing and leading whitespaces by using strip   If you have an array  such as I did  I needed to iterate through the array and save it after the instance ended  The   took care of this  This removed all whitespaces at the end or the beginning  not just the first leading or the last trailing   For example   array     hello       Melanie    is     new     to       programming   array each do  i    i strip  end   This would output to    hello   Melanie    is    new     to    programming    I further explored shared this in a video I made to highlight this code for similar question I had   I m newer to programming and using strip did not work as it didn t save it to the array after the loop ended

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split join will blast all spaces anywhere in the string      a b  c    d       split join  gt   abcd    It s easy to type and remember  so it s nice on the console and for quick hacking  Arguably not welcome in serious code though as it masks the intent    Based on Piotr s comment in Justicle s answer above

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Related answer       clean up my edges      strip   returns   clean up my edges

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Use gsub or delete  The difference is gsub could remove tabs  while delete cannot  Sometimes you do have tabs in files which are added by the editors   a     tI have some whitespaces  t  a gsub    s           gt    Ihavesomewhitespaces   a gsub                gt     tIhavesomewhitespaces  t  a delete              gt     tIhavesomewhitespaces  t  a delete     s        gt     tIhavesomewhitespaces  t  a delete     s        gt   using single quote is unexpected  and you ll get   tI have ome whitepace  t

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The gsub method will do just fine  The gsub method can be called on a string and says   a    this is a string  a   a gsub         puts a  Output  thisisastring   The gsub method searches for every occurrence of the first argument and replaces it with the second argument  In this case  it will replace every space within the string and remove it   Another example   b    the white fox has a torn tail    Let s replace every occurrence of the letter   t   with a capital   T    b   b gsub  t   T   puts b   Output  The whiTe fox has a Torn Tail

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I was trying to do this as I wanted to use a records  title  as an id in the view but the titles had spaces   a solution is   record value delete        Foo Bar - gt  FooBar

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Raheem Shaik   strip   It will removes left  amp  right side spaces  This code would give us   Raheem Shaik

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Also don t forget     s       I have white space     split   gt    I    have    white    space

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You can try this    ab c d efg hi   split map  amp  strip    in order to get this     ab   c    d    efg    hi     or if you want a single string  just use    ab c d efg hi   split join

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If you want to remove only leading and trailing whitespace  like PHP s trim  you can use  strip  but if you want to remove all whitespace  you can use  gsub   s        instead

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Ruby s  scan   and  join   methods of String can also help to overcome whitespace in string   scan   w    join will remove all spaces and join the string  string    White spaces in me  scan   w    join   gt  Whitespacesinme    It is also removing space from left and right part of the string  Means ltrim  rtrim and trim  Just in case if someone has background over C  FoxPro or Visual Basic and jump in Ruby    2 1 6  002  gt  string     White spaces in me   scan   w    join    gt   Whitespacesinme   2 1 6  003  gt  string     White spaces in me  scan   w    join    gt   Whitespacesinme   2 1 6  004  gt  string    White spaces in me   scan   w    join    gt   Whitespacesinme   2 1 6  005  gt

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I would use something like this   my string    Foo bar nbaz quux   my string split join   gt   Foobarbazquux

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For behavior exactly matching PHP trim  the simplest method is to use the String strip method  like so   string      Many have tried  many have failed       puts  Original    string     string length   new string   string strip puts  Updated     new string     new string length     Ruby also has an edit-in-place version  as well  called String strip   note the trailing        This doesn t require creating a copy of the string  and can be significantly faster for some uses   string      Many have tried  many have failed       puts  Original    string     string length   string strip  puts  Updated     string     string length     Both versions produce this output   Original    Many have tried  many have failed       40 Updated   Many have tried  many have failed   34   I created a benchmark to test the performance of some basic uses of strip and strip   as well as some alternatives   The test is this   require  benchmark   string    asdfghjkl  Times   25 000  a   Times times map   n  spaces          1 n 4      spaces   spaces   string   spaces     b   Times times map   n  spaces          1 n 4      spaces   spaces   string   spaces     c   Times times map   n  spaces          1 n 4      spaces   spaces   string   spaces     d   Times times map   n  spaces          1 n 4      spaces   spaces   string   spaces      puts RUBY DESCRIPTION puts                                                                puts  Running tests for trimming strings   Benchmark bm 20  do  x    x report  s strip                      a each   s  s   s strip       x report  s rstrip lstrip              a each   s  s   s rstrip lstrip       x report  s gsub                       a each   s  s   s gsub    s   s               x report  s sub sub                    a each   s  s   s sub    s        sub   s                x report  s strip                      a each   s  s strip        x report  s rstrip  lstrip             b each   s  s rstrip    s lstrip        x report  s gsub                       c each   s  s gsub     s   s               x report  s sub  sub                   d each   s  s sub     s          s sub    s             end   These are the results   ruby 2 2 5p319  2016-04-26 revision 54774   x86 64-darwin14                                                               Running tests for trimming strings                            user     system      total        real s strip                2 690000   0 320000   3 010000    4 048079  s rstrip lstrip        2 790000   0 060000   2 850000    3 110281  s gsub                13 060000   5 800000  18 860000   19 264533  s sub sub              9 880000   4 910000  14 790000   14 945006  s strip                2 750000   0 080000   2 830000    2 960402  s rstrip  lstrip       2 670000   0 320000   2 990000    3 221094  s gsub                13 410000   6 490000  19 900000   20 392547  s sub  sub            10 260000   5 680000  15 940000   16 411131

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s    I have white space  delete        And to emulate PHP s trim   function   s       I have leading and trailing white space     strip

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String strip - remove all whitespace from the start and the end   String lstrip - just from the start   String rstrip - just from the end   String chomp  with no arguments  - deletes line separators   n or  r n  from the end   String chop - deletes the last character   String delete - x delete    t r n   - deletes all listed whitespace   String gsub - x gsub     space          - removes all whitespace  including unicode ones     Note  All the methods above return a new string instead of mutating the original  If you want to change the string in place  call the corresponding method with   at the end

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My personal preference is using the method  tr  as in   string    this is a string to smash together   string tr              gt   thisisastringtosmashtogether    Thanks to  FrankScmitt for pointing out that to make this delete all whitespace not just spaces  you would need to write it as such   string    this is a string with tabs t and a  nnewline   string tr    n t           gt   thisisastringwithtabsandanewline

[ruby] Ruby function to remove all white spaces?

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