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Specifying a starting index less than the substring's leads to searching the substring throughout the entire string. But does it start at index 13?Įxample-3: Using a substring and a negative starting position It is true that the string substring starts at index 11 in the str string. Ĭonsole.log(str.includes("string", 11)) // true We can also check whether the target substring is located at a specific index. It is true that the string JavaScript string contains is easy contains the string substring.Įxample-2: Using a substring and a starting position If all conditions are true, the final regex is simply ^.Now let's dive into practical examples of the includes() method.Ĭonst str = document.querySelector('p').textContentĬonsole.log(str.includes("string")) // true The ^ assertion, stands for the location beginning of line, where starts the test of the following features ( look-arounds )Įach form (?.*.) is a positive look-around, a condition which must be verified to get an overall match

The initial modifiers force the search to be sensitive / insensitive ( -i / i ) to case, and also means that dot matches a single standard character only ( -s ) In regex D, rhe five first-names may be glued in bigger words, whatever their case In regex C, rhe five first-names may be glued in bigger words, but with their exact lower case In regex B, rhe five first-names must be true words, whatever their case In regex A, rhe five first-names must be true words, in the exact lower case

Here are, below, four regexes, from the more restrictive behaviour to the less restrictive behaviour :

To complete this topic, let’s suppose we want to find all lines with the five first-names : jack, james, jason, jules and Joe So, I’m back to N++ and the Community, for a while !!Īh, very clever regex, found by Alin Purcaru, on Stackoverflow site ! What to say ? We make a cure of seafood : cockles, periwinkles, clams, lobsters, crabs and even octopus ! To sum up : the Paradise -))Since one week, weather was quite fine, here, but today it was raining. Hello, and I’m not very reactive, cause I’m on holidays, in North Brittany, with my two sisters and their husbands.