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Nasal library: Difference between revisions
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→substr(): Add doc to do with negative integers
m (→caller() typo) |
Red Leader (talk | contribs) (→substr(): Add doc to do with negative integers) |
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|syntax = substr(string, start [, length]); | |syntax = substr(string, start [, length]); | ||
|source = {{simgear file|simgear/nasal/lib.c|l=129|t=Source}} | |source = {{simgear file|simgear/nasal/lib.c|l=129|t=Source}} | ||
|text = Similar the {{func link|subvec}}, but operates on strings. | |text = Similar the {{func link|subvec}}, but operates on strings. Computes and returns a substring. The first argument specifies a string, the second is the index of the start of a substring, the optional third argument specifies a length (the default is to return the rest of the string from the start). | ||
|param1 = string | |param1 = string | ||
|param1text = String to return a substring from. | |param1text = String to return a substring from. | ||
|param2 = start | |param2 = start | ||
|param2text = Integer specifying the start of a substring. | |param2text = Integer specifying the start of a substring. Negative values specify a position from the end of the string. | ||
|param3 = length | |param3 = length | ||
|param3text = Optional argument specifying the length of the substring. | |param3text = Optional argument specifying the length of the substring. Defaults to the end of the string. | ||
|example1 = print(substr("abcde", 1, 3)); # prints "bcd" | |example1 = print(substr("abcde", 1, 3)); # prints "bcd" | ||
|example2 = print(substr("abcde", 1)); # prints "bcde" | |example2 = print(substr("abcde", 1)); # prints "bcde" | ||
|example3 = print(substr("abcde", 2, 1)); # prints "c" | |example3 = print(substr("abcde", 2, 1)); # prints "c" | ||
|example4 = print(substr("abcde", -2)); # prints "de" | |||
|example5 = print(substr("abcde", -3, 2)); # prints "cd" | |||
}} | }} | ||