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Understanding Python's “is” operator
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You misunderstood what the is operator tests. It tests if two variables point the same object, not if two variables have the same value.
From the documentation for the is operator:
The operators is and is not test for object identity: x is y is true if and only if x and y are the same o...
Get JavaScript object from array of objects by value of property [duplicate]
Let's say I have an array of four objects:
17 Answers
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What are the main purposes of using std::forward and which problems it solves?
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You have to understand the forwarding problem. You can read the entire problem in detail, but I'll summarize.
Basically, given the expression E(a, b, ... , c), we want the expression f(a, b, ... , c) to be equivalent. In C++03, this is impossible. There are many at...
Difference between and
I'm learning Spring 3 and I don't seem to grasp the functionality behind <context:annotation-config> and <context:component-scan> .
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...unction I was working on to programmatically lighten or darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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How to sort a dataframe by multiple column(s)
I want to sort a data.frame by multiple columns. For example, with the data.frame below I would like to sort by column z (descending) then by column b (ascending):
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Type-juggling and (strict) greater/lesser-than comparisons in PHP
...ggling. I must admit it puzzles me, and I'm having a hard time to find out basic logical/fundamental things in comparisons.
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How to sort an array of integers correctly
...lowest value from an array that I know will contain only integers seems to be harder than I thought.
25 Answers
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Compare floats in php
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If you do it like this they should be the same. But note that a characteristic of floating-point values is that calculations which seem to result in the same value do not need to actually be identical. So if $a is a literal .17 and $b arrives there through a c...
How can I sort arrays and data in PHP?
...HP?
How do I sort a complex array in PHP?
How do I sort an array of objects in PHP?
12 Answers
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