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How do I know which version of Javascript I'm using?

I'm just reading this documentation about Javascript 1.2, but I'm wondering which version of Javascript is being used in the most popular browsers. ...
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How to calculate the number of occurrence of a given character in each row of a column of strings?

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Find MongoDB records where array field is not empty

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How do I create an empty array/matrix in NumPy?

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range() for floats

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How does numpy.histogram() work?

... 169 A bin is range that represents the width of a single bar of the histogram along the X-axis. Yo...
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Remove empty elements from an array in Javascript

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How to split a comma-separated value to columns

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Number.sign() in javascript

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Move an array element from one array position to another

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