Editing Regular expression (section)

=== Replace Newlines with Commas ===

Converting email lists into a format usable by email software:

<pre>Original:
aaa@email.com
bbb@email.com
ccc@email.com

Convert to:
aaa@email.com,bbb@email.com,ccc@email.com</pre>

==== Method 1: Sublime Text, EmEditor ====

# Menu: Search -&gt; Replace
# Check “Use Regular Expression”
#* Find: <code>\n</code> (newline character)
#* Replace with: <code>,</code>
# Click “Replace all”


==== Method 2: Notepad++ ====

# Menu: Find -&gt; Replace
# Search mode: Check “Extended mode” (not “Regular expression”)
#* Find: <code>\n</code>
#* Replace with: <code>,</code>
# Click “Replace All”


==== Method 3: Microsoft Word ====

# Menu: Edit -&gt; Replace
# Check extended mode
#* Find: <code>^p</code> (paragraph mark)
#* Replace with: <code>,</code>
# Click “Replace All”

==== Method 4: Sed command for Linux ====

<syntaxhighlight lang="bash">sed ':a;N;$!ba;s/\n/; /g' old.filename > new.filename</syntaxhighlight>