Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
ig

Test String

Code Generator

Language

Generated Code

re = /\b(FLOWLINKMEDIA ID=)/i str = '<FLOWLINKMEDIA ID="LDP_COMPLETE"> <PART NAME="MAIN"> <GRPH ZORDER="0" W="4000" H="3000"> <SOURCE>back01.png</SOURCE> </GRPH> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE LOCATION="VAR">MKTAD:MAIN_TILE</SOURCE> </GRPH> </PART> <PART NAME="OMP"> <REGION NAME="REQUEST_BOTTOM"> <TEXTBOX STYLE="REQUEST_PROMPT"> <SOURCE LOCATION="VAR">LANG:INF_ONEMOMENT</SOURCE> </TEXTBOX> </REGION> </PART> </FLOWLINKMEDIA> <FLOWLINKMEDIA ID="LDP_DEPOSITMENU"> <SM NAME="SMDL" /> <PART NAME="MAIN"> <GRPH ZORDER="0" W="4000" H="3000"> <SOURCE>back01.png</SOURCE> </GRPH> <REGION NAME="MARKETING_BANNER"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE LOCATION="VAR">MKTAD:OPENER_TILE</SOURCE> </GRPH> </REGION> <REGION NAME="MAIN"> <TEXTBOX STYLE="LINE1_LARGEPROMPT_WIDE"> <SOURCE LOCATION="VAR">LANG:PRM_INT_LDPMENU</SOURCE> </TEXTBOX> <SPEECH SCR_COMP="PROMPT"> <SOURCE LOCATION="VAR">LANG:TTS_PAUSE</SOURCE> </SPEECH> <TEXTBOX STYLE="PROMPT_SUBTEXT"> <VARSOURCE> <SOURCE LOCATION="VAR">LANG:INF_BCREFERENCE</SOURCE> <VAR NAME="BCTOACCT"> <SOURCE LOCATION="VAR">BUSOBJ:USERDATA\\TOACCT\\NAME_NUMBER</SOURCE> </VAR> </VARSOURCE> </TEXTBOX> <SPEECH SCR_COMP="PROMPT"> <SOURCE LOCATION="VAR">LANG:TTS_PAUSE</SOURCE> </SPEECH> </REGION> </PART> <PART NAME="NAV_BAR"> <REGION NAME="NAVIGATION_BAR"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE>nav_bar.png</SOURCE> </GRPH> </REGION> </PART> <PART NAME="CANCEL"> <ACTIONKEY VALUE="CANCEL"/> <REGION NAME="NAVIGATION_BAR_LEFT_BTN" TOUCH="Y"> <GRPH ZORDER="2" Y="80" X="90"> <SOURCE>nav_exit.png</SOURCE> </GRPH> <TEXTBOX STYLE="NAVBAR_LEFT_OPTION"> <SOURCE LOCATION="VAR">LANG:FDK_CANCEL</SOURCE> </TEXTBOX> </REGION> </PART> <PART NAME="TYPE_PANEL"> <REGION NAME="MAIN_PANEL" TOUCH="N"> <GRPH ZORDER="1"> <SOURCE>main_panel.png</SOURCE> </GRPH> </REGION> </PART> <DISPLAYLIST LISTNAME="DEPTYPE" EVENTNAME="FE_SELECTED"> <POSITIONS> <POS REGION_NAME="MAIN_PANEL_1OF3" TOUCH="Y"> <SPITEM ITEMNAME="SHOW" ENABLEINPUT="Y"> <GRPH ZORDER="3"> <SOURCE>primary_tile_1.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="GHOST" ENABLEINPUT="N"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE>primary_tile_1_ghost.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_1OF2"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_2OF2"> <SOURCE LOCATION="VAR">LANG:MENU_TEMP_UNAVAILABLE</SOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="HIDE" ENABLEINPUT="N"/> <RESPONSE DISPLAYTIME="100"> <GRPH ZORDER="0" TP="#00FF00"> <SOURCE>Highlight\\primary_tile_1.png</SOURCE> </GRPH> </RESPONSE> </POS> <POS REGION_NAME="MAIN_PANEL_2OF3" TOUCH="Y"> <SPITEM ITEMNAME="SHOW" ENABLEINPUT="Y"> <GRPH ZORDER="3"> <SOURCE>primary_tile_1.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="GHOST" ENABLEINPUT="N"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE>primary_tile_1_ghost.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_1OF2"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_2OF2"> <SOURCE LOCATION="VAR">LANG:MENU_TEMP_UNAVAILABLE</SOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="HIDE" ENABLEINPUT="N"/> <RESPONSE DISPLAYTIME="100"> <GRPH ZORDER="0" TP="#00FF00"> <SOURCE>Highlight\\primary_tile_1.png</SOURCE> </GRPH> </RESPONSE> </POS> <POS REGION_NAME="MAIN_PANEL_3OF3" TOUCH="Y"> <SPITEM ITEMNAME="SHOW" ENABLEINPUT="Y"> <GRPH ZORDER="3"> <SOURCE>primary_tile_1.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="GHOST" ENABLEINPUT="N"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE>primary_tile_1_ghost.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_1OF2"> <VARSOURCE LOCATION="VAR"> <SOURCE>LANG:INF_LDPMENU_</SOURCE> <SOURCE LOCATION="DISPLAYLIST">VALUE</SOURCE> </VARSOURCE> </TEXTBOX> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER_2OF2"> <SOURCE LOCATION="VAR">LANG:MENU_TEMP_UNAVAILABLE</SOURCE> </TEXTBOX> </SPITEM> <SPITEM ITEMNAME="HIDE" ENABLEINPUT="N"/> <RESPONSE DISPLAYTIME="100"> <GRPH ZORDER="0" TP="#00FF00"> <SOURCE>Highlight\\primary_tile_1.png</SOURCE> </GRPH> </RESPONSE> </POS> </POSITIONS> <SMDEFINED> <SMITEM SMNAME="MORE" EVENTNAME="MORE"> <GRPH ZORDER="1" TP="#00FF00"> <SOURCE>primary_tile_1.png</SOURCE> </GRPH> <TEXTBOX STYLE="PRIMARY_TILE1_CENTER"> <SOURCE LOCATION="VAR">LANG:FDK_MOREACCTS</SOURCE> </TEXTBOX> </SMITEM> </SMDEFINED> </DISPLAYLIST> </FLOWLINKMEDIA>' # Print the match result str.scan(re) do |match| puts match.to_s end

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html