String matching: Difference between revisions
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m (→{{header|J}}) |
(→{{header|J}}: faster/more efficient contains) |
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<lang j>startswith=: ] -: ({.~ #) |
<lang j>startswith=: ] -: ({.~ #) |
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contains=: |
contains=: +./@:E.~ |
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endswith=:] -: ({.~ -@#)</lang> |
endswith=:] -: ({.~ -@#)</lang> |
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'abab' contains 'ab' |
'abab' contains 'ab' |
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1 |
1 |
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'abab' I.@E.~ 'ab' |
'abab' I.@E.~ 'ab' NB. find starting indicies |
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0 2</lang> |
0 2</lang> |
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Note that these verbs also apply to arrays of type other than character so: |
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Note that the last example was finding indices rather than determining whether or not the substring was present. |
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<lang j> 0 1 2 3 startswith 0 1 NB. integer |
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1 |
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4.2 5.1 1.3 9 3 contains 1.3 4.2 NB. floating point |
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0 |
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4.2 5.1 1.3 4.2 9 3 contains 1.3 4.2 |
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1</lang> |
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=={{header|Java}}== |
=={{header|Java}}== |
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