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Performance differences between debug and release builds
...d code so difficult. And giving the volatile keyword a meaning.
Array index checking elimination. An important optimization when working with arrays (all .NET collection classes use an array internally). When the JIT compiler can verify that a loop never indexes an array out of bounds then it wil...
Retrieve database or any other file from the Internal Storage using run-as
...atabases/file from an Android 5.1+ device run the following command:
adb exec-out run-as debuggable.app.package.name cat databases/file > file
To download multiple files in a folder under the /data/data/debuggable.app.package.name/ at once - use tar:
adb exec-out run-as debuggable.app.package...
How do I convert a numpy array to (and display) an image?
... You create array with size (w,h,3), but it should be (h,w,3), because indexing in PIL differs from indexing in numpy. There is related question: stackoverflow.com/questions/33725237/…
– fdermishin
Dec 6 '15 at 18:57
...
How do I define global variables in CoffeeScript?
...indow.
Node.js
In Node.js there's no window object, instead there's the exports object that gets passed into the wrapper that wraps the Node.js module (See: https://github.com/ry/node/blob/master/src/node.js#L321 ), so in Node.js what you would need to do is exports.foo = 'baz';.
Now let us take ...
What's the maximum value for an int in PHP?
...he PHP manual:
The size of an integer is
platform-dependent, although a maximum
value of about two billion is the
usual value (that's 32 bits signed).
PHP does not support unsigned
integers. Integer size can be
determined using the constant
PHP_INT_SIZE, and maximum value using
the constant PHP_INT...
What does !! mean in ruby?
...legitimately is preventing a huge chunk of data from being returned. For example you probably don't want to return 3MB of image data in your has_image? method, or you may not want to return your entire user object in the logged_in? method. Using !! converts these objects to a simple true/false.
...
How to sort objects by multiple keys in Python?
...comparer)
You can call it like this:
b = [{u'TOT_PTS_Misc': u'Utley, Alex', u'Total_Points': 96.0},
{u'TOT_PTS_Misc': u'Russo, Brandon', u'Total_Points': 96.0},
{u'TOT_PTS_Misc': u'Chappell, Justin', u'Total_Points': 96.0},
{u'TOT_PTS_Misc': u'Foster, Toney', u'Total_Points': 80.0}...
What are CN, OU, DC in an LDAP search?
I have a search query in LDAP like this. What exactly does this query mean?
3 Answers
...
Common programming mistakes for Clojure developers to avoid [closed]
...
Literal Octals
At one point I was reading in a matrix which used leading zeros to maintain proper rows and columns. Mathematically this is correct, since leading zero obviously don't alter the underlying value. Attempts to define a var with this matrix, however, would fail mys...
How to write a switch statement in Ruby
...
Ruby uses the case expression instead.
case x
when 1..5
"It's between 1 and 5"
when 6
"It's 6"
when "foo", "bar"
"It's either foo or bar"
when String
"You passed a string"
else
"You gave me #{x} -- I have no idea what to do with that....