Filters

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# 9.18. Filters

Kill lines containing a regexp and Kill all lines without a regexp - fine tool to filter some lines those contains (or not) some text. Put the regexp into the Famous text entry and then use the function.

For example, you have the list of names and you want to remove all those starts from "John". So use a regexp "John*" and apply Kill lines containing a regexp.

Extract at the each line - extracts some text bewteen two delimeters, at the each line. The first and the second separators must be written into the Famous text entry in the form such as: first_delimeter~last delimeter. For example, the text is:

    g_print ("hello\n");
    g_print ("world\n");

We put the "~" (double quotes, tilde, double) template into the famous text entry. Select the text and apply this function. After that you shall have as the result:

    hello\n
    world\n

Extract at the each line before a separator and Extract at the each line after a separator - a custom case of the previous function. But here is only one delimeter is used in the Famous text entry. For example, to cut off all comments in the C++-like text, you can set // as the delimeter value and use the Extract at the each line before a separator function.

Kill lines with a phrase. Select a text. Enter some phrase into the Famous text entry. Apply this function. As a result, all lines containing your phrase will be deleted from the selection.

Kill all lines except with a phrase. Select some text. Enter some phrase into the famous text entry. Apply this function. As a result, all lines without your phrase will be deleted from the selection.

Kill all lines < N characters - Kill in the selection all lines smaller than N (value in the Famous text entry) characters.

Kill all lines > N characters - Kill in the selection all lines smaller than N (value in the Famous text entry) characters.

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