copattern
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— | copattern [2007/03/02 02:32] (current) – created - external edit 127.0.0.1 | ||
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+ | # $EPIC: copattern.txt, | ||
+ | ======Synopsis: | ||
+ | $[[copattern]](< | ||
+ | |||
+ | ======Description: | ||
+ | The < | ||
+ | than most functions. | ||
+ | |||
+ | This function is the complementary operation of [[cofilter]] | ||
+ | |||
+ | This function is closely related to [[pattern]], | ||
+ | words in a word list that do not match a wildcard pattern. | ||
+ | |||
+ | All of the co* functions take a wildcard pattern, and two variable names. | ||
+ | The variables should contain word lists and each variable should have the | ||
+ | same number of words. | ||
+ | against the wildcard pattern, and depending on result, the corresponding | ||
+ | word in the second list is included or excluded in the return value. | ||
+ | |||
+ | The [[copattern]] function returns all those words in $< | ||
+ | in position to those words in $< | ||
+ | |||
+ | Parsing ends whenever the shorter of the two word lists runs out of words. | ||
+ | Therefore, the two word lists should have the same number of words. | ||
+ | |||
+ | The wildcard < | ||
+ | if the pattern contains spaces. | ||
+ | of the wildcard pattern. | ||
+ | |||
+ | ======Practical: | ||
+ | When you have two variables, one that contains a list of control data, | ||
+ | and another that contains a list of secondary data, and you wish to | ||
+ | retrieve the secondary data, but you need to do it based on a query of | ||
+ | the control data, you might use this function. | ||
+ | be if one variable held your friends list, and another held their access | ||
+ | levels. | ||
+ | |||
+ | ======Returns: | ||
+ | The words from $< | ||
+ | that are not matched by < | ||
+ | |||
+ | ======Examples: | ||
+ | < | ||
+ | @ friends = [bob@foo.com tom@bar.com] | ||
+ | @ levels | ||
+ | $copattern(*@foo.com friends levels) | ||
+ | $copattern(*@bar.com friends levels) | ||
+ | $copattern(*@*.com friends levels) | ||
+ | $copattern(*@*.net friends levels) | ||
+ | </ | ||
copattern.txt · Last modified: 2007/03/02 02:32 by 127.0.0.1