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notes:perl_cheat_sheet

Differences

This shows you the differences between two versions of the page.

--- notes:perl_cheat_sheet [2026/11/03 07:48]
216.73.216.55 old revision restored (2026/11/01 08:01)
+++ notes:perl_cheat_sheet [2026/11/03 15:51] (current)
216.73.217.9 old revision restored (2026/11/02 18:14)
@@ Line 23: / Line 23: @@
   * When a scalar is interpreted as a boolean, the following are //false// : 0, '0', %%''%%, undefined .
   * !! is a handy shortcut to convert any scalar to 0 or 1 (to represent a boolean)
-  * Variables have value ''undef'' before being assigned. ''undef'' acts as a 0 or "" as needed, but will throw a warning if printed.
-  * ''defined()'' checks if a variable has been defined. Can also set a variable to ''undef''.
-===== Lists and Arrays =====
 ===== Numbers =====

notes/perl_cheat_sheet.1793720914.txt.gz · Last modified: 2026/11/03 07:48 by 216.73.216.55

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