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How do I check if an array includes a value in JavaScript?
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How do I determine whether an array contains a particular value in Java?
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How to check if one of the following items is in a list?
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What's quicker and better to determine if an array key exists in PHP?
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How to check if an array element exists?
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array_unique for objects?
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How might I check if a particular NSString is present in an NSArray?
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How can I check if a Perl array contains a particular value?
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Object comparison in JavaScript
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Get array of object's keys
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Detecting an undefined object property
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fastest way to detect if a value is in a group of values in Javascript
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How to detect if a variable is an array
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How to filter a javascript object array with variable parameters
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How to determine an object's class?
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How to check whether multiple values exist within an Javascript array
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How to Check for a Specific Type of Object in PHP