How can I check if a string contains another string instead of using "==" to compare the whole string?
Regards
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Here a benchmark for the most common ways to check if a string is in a string: http://jsben.ch/#/o6KmH – EscapeNetscape Oct 31 '16 at 17:05
1 Answers
214
You can use .indexOf():
if(str.indexOf(substr) > -1) {
}
Felix Kling
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didn't work when I use msgCache[id].headers.subject.indexOf("DELIVERY FAILURE:") > -1 – donald May 24 '11 at 10:12
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and the subject is: DELIVERY FAILURE: User fdfd.ablfdfitt (df.fdf@dfdf.com) not listed in Domino Directory – donald May 24 '11 at 10:13
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it returns "DELIVERY FAILURE: User fdfd.ablfdfitt (df.fdf@dfdf.com) not listed in Domino Directory" – donald May 24 '11 at 10:14
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3@donald: Works for me: http://jsfiddle.net/bZUvp/ (and it also works with node.js, it's the same JavaScript) – Felix Kling May 24 '11 at 10:14
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1Actually, the message is inside an array [ 'DELIVERY FAILURE: User fdfd.ablfdfitt (df.fdf@dfdf.com) not listed in Domino Directory' ] sorry for the mistake. – donald May 24 '11 at 10:19
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