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Purpose |
Return a string containing only the characters contained in a specified match string. All other characters are removed.. |
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Syntax |
sResult$ = RETAIN$(main$, [ANY] match$) |
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Remarks |
RETAIN$ returns a string consisting of zero or more copies of the complete expression match$ which are found in main$. All other characters are removed. |
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ANY |
If the ANY option is included, match$ specifies a list of single characters to be retained, if they are found in main$. |
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Restrictions |
If match$ is an empty string, RETAIN$ returns an empty string. |
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See also |
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Example |
a$ ="<p>1234567890<ak;lk;l>1234567890</p>" b$ = RETAIN$(a$, ANY "<;/p>") c$ = RETAIN$(a$, ANY "0123456789") |
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Result |
b$ contains "<p><;;></p>" c$ contains "12345678901234567890" |