How I would determine if a string contains multiple substrings?
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I'd like to know if a string has multiple substrings (e.g, words) in it.
For example:
myString = "This has some words in it.";
I would want to know if that string has "This" AND "some". I know I can use "contains" to look for individual substrings, but I want to know if ALL substrings are in a string.
采纳的回答
3 个评论
Ludo Houben
2023-11-10
Hi @Pat Canny
Is there a way to also exclude a string? So eg. if you want to search for missing parts in a variable declaration? I need something like
'ARRAY[' AND NOT ('..' OR ']')
As I want to include this in a 'cellfun' formula.
Thanks
Ludo
Ludo Houben
2023-11-16
更多回答（3 个）
myString = "This has some words in it.";
subStrings = ["This","some"];
hasAllSubstrings = isequal(regexp(myString, subStrings, 'once', 'match'), subStrings)
myString = "This has some words in it.";
if contains(myString, "This") && contains(myString, "some")
disp Yes
else
disp No
end
myString = "This has some words in it.";
s = split(myString)
whichWordsAreIn = ismember(["some"; "in"], s)
allWordsIn = all(whichWordsAreIn)
You can combine this into one command if you want; I showed temporary variables to illustrate each step. For exclusions you want to wrap the ismember call in ~any() instead of all.
2 个评论
myString = "This has some words in it.";
s = split(myString)
whichWordsAreIn = ismember(["some"; "it"], s) % what happend to "it" ?
I neglected to remove punctuation from the string before splitting it. The isstrprop function could help with this (though you'd have to be careful with punctuation included as part of a word, like "you'd" as I wrote earlier in this phrase.)
The accepted answer has a similar problem, if you change the text to be examined to include a word that contains as part of it one of the substrings being searched for.
myString = "This has something words in it.";
subStrings = ["This","some"]; % myString has "something", does that match "some"?
hasAllSubstrings = all(arrayfun(@(substr) contains(myString, substr, 'IgnoreCase', true), subStrings))
For more general cases and processing lots of data, you may want to use the functionality for analyzing text data provided in Text Analytics Toolbox.
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