Tokenize a string: Difference between revisions
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There are built in libraries for tokenising strings, illustrated below, along with code that the user could create for the task. |
There are built in libraries for tokenising strings, illustrated below, along with code that the user could create for the task. |
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First show |
First show the use of sysparse_string to break up a string and make a list of strings. |
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;;; Make a list of strings from a string using space as separator |
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lvars list; |
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sysparse_string('the cat sat on the mat') -> list; |
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;;; print the list of strings |
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list => |
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** [the cat sat on the mat] |
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By giving it an extra parameter 'true' we can make it recognize numbers and produce a list of strings and numbers |
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lvars list; |
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sysparse_string('one 1 two 2 three 3 four 4', true) -> list; |
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;;; print the list of strings and numbers |
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list => |
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** [one 1 two 2 three 3 four 4] |
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;;; check that first item is a string and second an integer |
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isstring(list(1))=> |
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** <true> |
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isinteger(list(2))=> |
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** <true> |
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Now show some uses of the built in procedure sys_parse_string, which allows more options: |
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;;; Make pop-11 print strings with quotes |
;;; Make pop-11 print strings with quotes |
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