Difference between revisions of "-z"

Latest revision as of 10:28, 3 September 2022

[[ -z $1 ]] && { [[usage]]; }
[ -z $1 ] && { usage; }

function usage() {
    echo "Usage: $(basename $0) Explain options here"
    exit 0
}

@@ Line 1: / Line 1: @@
-<code>[ -z $1 ] && { [[usage]]; }</code>
+ <nowiki>[[ -z $1 ]] && { [[usage]]; }</nowiki>
+ <code>[ -z $1 ] && { [[usage]]; }</code>
 == Related ==
   function [[usage]]() {
-      echo "Usage:" $(basename $0) Explain options here"
+      echo "Usage: $(basename $0) Explain options here"
       [[exit 0]]
   }
@@ Line 10: / Line 12: @@
 * [[If]]
+* [[binary operator expected]]
+* [[Square bracket]]
+* [[Single bracket]]
+* [[Double bracket]]
 == See also ==