ignoreCase – true to ignore character case when comparing strings. By default false . Returns true if this character is equal to the other character, optionally ignoring character case. Two characters are considered equal ignoring case if Char.
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contains(element: T)’ to get the same search behavior as in a list . Returns true if element is found in the array. Returns true if element is found in the collection. Checks if the map contains the given key.
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Check whether a string contains a substring in Kotlin
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toLowerCase() One of the easiest ways to check if a String has a substring without considering the case is to convert all the Strings to lowercase and then check for a substring . To check for a substring, we use the contains() method, and for converting the String to lowercase, we use the toLowerCase() method.
Read moreWhat does ?: Mean in Kotlin?
length ?: -1. If the expression to the left of ?: is not null , the Elvis operator returns it, otherwise it returns the expression to the right . Note that the expression on the right-hand side is evaluated only if the left-hand side is null .
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Kotlin for loop is equivalent to the foreach loop in languages like C#.
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