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What are forward declarations in C++?
...unction may live in a different object file the linker is joining with the one that uses add to produce a dll or exe. It's possible that the linker may get the wrong add. Say you wanted to use int add(int a, float b), but accidentally forgot to write it, but the linker found an already existing int ...
Memcached vs. Redis? [closed]
...d at ~225MB. They are similarly efficient in how they store data, but only one is capable of reclaiming it.
Disk I/O dumping: A clear win for redis since it does this by default and has very configurable persistence. Memcached has no mechanisms for dumping to disk without 3rd party tools.
Scaling:...
Understanding :source option of has_one/has_many through of Rails
Please help me in understanding the :source option of has_one/has_many :through association. The Rails API explanation makes very little sense to me.
...
Anti-forgery token issue (MVC 5)
... at it
Then look at the current ClaimsIdentity and examine the claims
Find one that you think will uniquely identify your user
Set the AntiForgeryConfig.UniqueClaimTypeIdentifier to that claim type
Put back the [ValidateAntiForgeryToken] attribute
...
Django: How to manage development and production settings?
..., "shared settings" file), and use DJANGO_SETTINGS_MODULE to control which one to use.
Here's how:
As noted in the Django documentation:
The value of DJANGO_SETTINGS_MODULE should be in Python path syntax, e.g. mysite.settings. Note that the settings module should be on the Python import searc...
Insert line after first match using sed
... Solaris...)):
sed '/CLIENTSCRIPT=/a\
CLIENTSCRIPT2="hello"' file
Or on one line:
sed -e '/CLIENTSCRIPT=/a\' -e 'CLIENTSCRIPT2="hello"' file
(-expressions (and the contents of -files) are joined with newlines to make up the sed script sed interprets).
The -i option for in-place editing is als...
What does axis in pandas mean?
... numpy.mean usage when axis is specified explicitly (in numpy.mean, axis==None by default, which computes the mean value over the flattened array) , in which axis=0 along the rows (namely, index in pandas), and axis=1 along the columns. For added clarity, one may choose to specify axis='index' (inst...
Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
...
One sentence answer: <<no matter how many layers would behave just like a single perceptron (because linear functions added together just give you a linear function).>>. Nice!
– Autonomous
...
How to convert PascalCase to pascal_case?
...A sequence beginning with an uppercase letter can be followed by either:
one or more uppercase letters and digits (followed by either the end of the string or an uppercase letter followed by a lowercase letter or digit ie the start of the next sequence); or
one or more lowercase letters or digits....
How do I create a constant in Python?
...attribute, and can contain any value. Declaration is easy Nums = Constants(ONE=1, PI=3.14159, DefaultWidth=100.0), Usage is straightforward print 10 + Nums.PI, attempt to change results in exception Nums.PI = 22 => ValueError(..).
– ToolmakerSteve
Dec 11 '13...