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Determine whether an array contains a value
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How to compare strings ignoring the case
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How can I check if a string exists in another string
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How to check if the URL contains a given string?
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How can I match a whole word in JavaScript?
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How to determine if one array contains all elements of another array
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Check if a Bash array contains a value
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Check whether a string is not null and not empty
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Check string for palindrome
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Match string pattern to any array element
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How do I iterate over the words of a string?
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PHP search array in array