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How to compare arrays in JavaScript?

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How default .equals and .hashCode will work for my classes?

...valence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true). hashCode As much as is reasonably practical, the hashCode method defined by class Object does return dist...
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in iPhone App How to detect the screen resolution of the device

...the entire screen's resolution in points, so it would most typically be 320x480 for iPhones. Even though the iPhone4 has a much larger screen size iOS still gives back 320x480 instead of 640x960. This is mostly because of older applications breaking. CGFloat screenScale = [[UIScreen mainScreen] sca...
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Sequence contains more than one element

...leOrDefault. This method will only succeed when the collections contains exactly 0 or 1 element. I believe you are looking for FirstOrDefault which will succeed no matter how many elements are in the collection. share ...
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Converting a column within pandas dataframe from int to string

I have a dataframe in pandas with mixed int and str data columns. I want to concatenate first the columns within the dataframe. To do that I have to convert an int column to str . I've tried to do as follows: ...
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count the frequency that a value occurs in a dataframe column

...b')}) df.groupby('a').count() Out[37]: a a a 2 b 3 s 2 [3 rows x 1 columns] See the online docs: http://pandas.pydata.org/pandas-docs/stable/groupby.html Also value_counts() as @DSM has commented, many ways to skin a cat here In [38]: df['a'].value_counts() Out[38]: b 3 a 2 s...
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How to iterate over array of objects in Handlebars?

... Then is it possible to call the index number of the outer loop {{#each people}} inside the inner loop {{#each this}} ? Like {{people@index}} – RegarBoy May 22 '17 at 7:47 ...
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What are the Ruby Gotchas a newbie should be warned about? [closed]

...age. But I was quite surprised to see that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For example: ...
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How to show full object in Chrome console?

... improves on @BastiBen's by formatting the output. – Xeoncross Apr 24 '19 at 19:25 add a comment  |  ...
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Regular expression for a hexadecimal number?

How do I create a regular expression that detects hexadecimal numbers in a text? 11 Answers ...