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Is JavaScript a pass-by-reference or pass-by-value language?

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Make copy of an array

I have an array a which is constantly being updated. Let's say a = [1,2,3,4,5] . I need to make an exact duplicate copy of a and call it b . If a were to change to [6,7,8,9,10] , b should still be [1,2,3,4,5] . What is the best way to do this? I tried a for loop like: ...
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Is it possible to modify variable in python that is in outer, but not global, scope?

... think this does what you want, but I'm not sure if you are running python 2 or 3. The nonlocal statement causes the listed identifiers to refer to previously bound variables in the nearest enclosing scope. This is important because the default behavior for binding is to search the local n...
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How to get the focused element with jQuery?

... 752 // Get the focused element: var $focused = $(':focus'); // No jQuery: var focused = document.ac...
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XPath query to get nth instance of an element

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Using Java to find substring of a bigger string using Regular Expression

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Current executing procedure name

... OBJECT_NAME(@@PROCID) Update: This command is still valid on SQL Server 2016. share | improve this answer | follow | ...
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Package cairo was not found in the pkg-config search path. Node j.s install canvas issue

...emex's link helped me troubleshoot it. ... You need to install libcairo2-dev, libjpeg-dev and libgif-dev packages ... sudo apt-get install libcairo2-dev libjpeg-dev libgif-dev share | improve...
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Moving matplotlib legend outside of the axis makes it cutoff by the figure box

...plotlib.pyplot as plt import numpy as np plt.gcf().clear() x = np.arange(-2*np.pi, 2*np.pi, 0.1) fig = plt.figure(1) ax = fig.add_subplot(111) ax.plot(x, np.sin(x), label='Sine') ax.plot(x, np.cos(x), label='Cosine') ax.plot(x, np.arctan(x), label='Inverse tan') handles, labels = ax.get_legend_hand...
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Command not found error in Bash variable assignment

... When you write: STR = "foo" bash tries to run a command named STR with 2 arguments (the strings '=' and 'foo') When you write: STR =foo bash tries to run a command named STR with 1 argument (the string '=foo') When you write: STR= foo bash tries to run the command foo with STR set to the...