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unshift_command [2006/08/29 16:08] (current)
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 +__unshift__ <​variable name> <​word>​ \\
 +__shift__ ​  <​variable name>
 +__UNSHIFT__ prepends the given word (or words) to the given variable,
 +padded with a single space. ​ The variable name itself may not contain
 +a leading '​$';​ the command uses the variable itself, not the expanded
 +contents. ​ If the variable does not exist, it is created containing
 +the given word(s) (just as if [[ASSIGN]] were used).
 +__SHIFT__ is the exact opposite of __UNSHIFT__,​ in that it chops off the first
 +word in the variable. ​ If there is only one word in the variable, the variable
 +is deleted. ​ Both __UNSHIFT__ and __SHIFT__ are functionally equivalent to the
 +$[[unshift function|unshift]]() and $[[shift function|shift]]() functions,
unshift_command.txt ยท Last modified: 2006/08/29 16:08 (external edit)