query: How to count the number of occurrences of each item in an array?
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positive_passages.text: Counting the occurrences / frequency of array elements
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negative_passages.text: Getting a count of list items in a list via ECMAScript
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negative_passages.text: How to find the last occurrence of an item in a Python list
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negative_passages.text: How to replace multiple items with same count of a different item?
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negative_passages.text: How can I multiply each item in an array easily with PHP?
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negative_passages.text: Count the number of occurrences of a character in a string in Javascript
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negative_passages.text: Scala how can I count the number of occurrences in a list
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negative_passages.text: How to count occurrences of a column value efficiently in SQL?
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negative_passages.text: How would you count occurrences of a string (actually a char) within a string?
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negative_passages.text: How to find an item in array which has the most occurrences
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negative_passages.text: How to count duplicate elements in a Ruby array
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negative_passages.text: How to find duplicate elements in array using for loop in Python?
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negative_passages.text: How to find the only number in an array that doesn't occur twice
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negative_passages.text: How do I find the length of an array?