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Top Forums Shell Programming and Scripting awk and gsub - how to replace only the first X occurrences Post 302456516 by bingel on Friday 24th of September 2010 11:59:00 AM
Old 09-24-2010
Thanks, but using awk and gsub?

I don't know ruby and I would like to use awk because so I could adapt the script to my needs.

Thanks again

---------- Post updated at 04:44 PM ---------- Previous update was at 04:43 PM ----------

Thanks again, I had not seen the last message

---------- Post updated at 04:55 PM ---------- Previous update was at 04:44 PM ----------

@quirkasaurus

I have tested your first code but I obtain this output:

Code:
REPLACE sweet head
REPLACE book brown
tiger CAR cow CAR
CAR milk

The second row is deleted

---------- Post updated at 04:59 PM ---------- Previous update was at 04:55 PM ----------

With this code it runs:

Code:
cat text.txt | awk '{if ( count < 3 ){ gsub("CAR","REPLACE")} count++; print}'

 

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DXmCSTextReplace(3X)													      DXmCSTextReplace(3X)

NAME
DXmCSTextReplace - Replaces a specified segment of text in a compound string text widget. SYNOPSIS
DXmCSTextStatus DXmCSTextReplace( Widget widget, int from_pos, int to_pos, XmString value ); PARAMETERS
The identifier (widget ID) of the compound string text widget. An integer that represents the first character position of the text being replaced. An integer that represents the last character position of the text being replaced. Replacement text for part of the current text in the compound string text widget, or additional text to be inserted into the compound string text widget. DESCRIPTION
The DXmCSTextReplace routine replaces part of the text in the compound string text widget. Within the widget, positions are numbered starting at 0 and increasing sequentially. For example, to replace the second and third characters in the text, from_pos should be 1 and to_pos should be 3. To insert text after the fourth character, from_pos and to_pos should both be 4. RETURN VALUES
A value that represents the status (success or failure) of the replace operation, as follows: -------------------------------------------------------- Value Description -------------------------------------------------------- DXmCSTextStatusEditDone Text replaced successfully. DXmCSTextStatusEditError Text not replaced (failure). -------------------------------------------------------- SEE ALSO
DXmCreateCSText(3X), DXmCSTextSetString(3X), DXmCSTextGetString(3X) DXmCSTextReplace(3X)
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