Differences

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--- bash:brackets [2021/01/09 13:57] – [Escaping of Parentheses] peter
+++ bash:brackets [2021/01/09 13:59] (current) – [Rule of Thumb] peter
@@ Line 208: / Line 208: @@
 ===== Rule of Thumb =====
-As a rule of thumb, [[ is used for strings and files.
+As a rule of thumb, **[[** is used for strings and files.
 If you want to compare numbers, use an ArithmeticExpression, e.g.
@@ Line 218: / Line 218: @@
 </code>
-When should the new test command <nowiki>[[</nowiki> be used, and when the old one <nowiki>[</nowiki>?  If portability/conformance to POSIX or the Bourne Shell is a concern, the old syntax should be used.  If on the other hand the script requires BASH, Zsh, or KornShell, the new syntax is usually more flexible, but not necessarily backwards compatible.
+When should the new test command <nowiki>[[</nowiki> be used, and when the old one <nowiki>[</nowiki>?
-For reasons explained in the theory section below, any problem with an operator used with <nowiki>[[</nowiki> is an unhandleable parse-time error that will cause bash to terminate, even if the command is never evaluated.
+  * If portability/conformance to POSIX or the Bourne Shell is a concern, the old syntax should be used.
+  * If on the other hand the script requires BASH, Zsh, or KornShell, the new syntax is usually more flexible, but not necessarily backwards compatible.
+<WRAP info>
+**NOTE:**  Any problem with an operator used with **<nowiki>[[</nowiki>** resulting in an unhandleable parse-time error will cause bash to terminate, even if the command is never evaluated.
+</WRAP>