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0fbcc4b95d
- support negative start value (e.g. substr('hello',-2) returns 'lo')
- support negative length value (e.g. substr('hello',3,-1) returns 'll')
- length parameter now optional, defaults to end of string
(e.g. substr('hello world',7) returns 'world')
17 lines
1.0 KiB
Plaintext
17 lines
1.0 KiB
Plaintext
{
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"name": "substr",
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"type": "function",
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"description": "Returns a part of a string.",
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"arguments": [ {"arg":"string","description":"the full input string"},
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{"arg":"start","description":"integer representing start position to extract from; if start is negative, the return string will begin at the end of the string minus the start value"},
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{"arg":"length","optional":true,"description":"integer representing length of string to extract; if length is negative, the return string will omit the given length of characters from the end of the string"}
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],
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"examples": [ { "expression":"substr('HELLO WORLD',3,5)", "returns":"'LLO W'"},
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{ "expression":"substr('HELLO WORLD',6)", "returns":"'WORLD'"},
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{ "expression":"substr('HELLO WORLD',-5)","returns":"'WORLD'"},
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{ "expression":"substr('HELLO',3,-1)", "returns":"'LL'"},
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{ "expression":"substr('HELLO WORLD',-5,2)","returns":"'WO'"},
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{ "expression":"substr('HELLO WORLD',-5,-1)","returns":"'WORL'"}
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]
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}
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