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I have a lot of strings, and I need to check if each of them contains a color.
For example :
So, the two last strings must return true.
What is the best way to find it?
Regex, or check with any substr() ?
489
The in Operator It returns a Boolean (either True or False ). To check if a string contains a substring in Python using the in operator, we simply invoke it on the superstring: fullstring = "StackAbuse" substring = "tack" if substring in fullstring: print("Found!") else: print("Not found!")
Check if a string contains a sub-string in C++This find() method returns the first location where the string is found. Here we are using this find() function multiple times to get all of the matches. If the item is found, this function returns the position. But if it is not found, it will return string::npos.
To locate a substring in a string, use the indexOf() method. Let's say the following is our string. String str = "testdemo"; Find a substring 'demo' in a string and get the index.
Search for string inside another string - strstrThe function strstr returns the first occurrence of a string in another string. This means that strstr can be used to detect whether a string contains another string. In other words, whether a string is a substring of another string.
I always work with strpos since it seems to be the fastest alternative (don't know about regex though).
if(strpos($haystack, $needle) !== FALSE) return $haystack;
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