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How to read the RGB value of a given pixel in Python?
...ich returns a pixel access object which you can manipulate like an array:
from PIL import Image
im = Image.open('dead_parrot.jpg') # Can be many different formats.
pix = im.load()
print im.size # Get the width and hight of the image for iterating over
print pix[x,y] # Get the RGBA Value of the a...
remove_if equivalent for std::map
I was trying to erase a range of elements from map based on particular condition. How do I do it using STL algorithms?
13 A...
log messages appearing twice with Python Logging
...odules were loaded, the logger variable used, was not the one instantiated from one of my classes, but the logger variable present on Python3 cache, and the handler was added every 60 sec by an AppScheduler which I configured. So, this if not logger.handlers is a pretty smart way to avoid this type ...
Why are margin/padding percentages in CSS always calculated against width?
...poyzer I'd guess in the simplest case that browsers calculate block widths from the outside in (root to tips), then flow content into those blocks to determine their heights (tips to root).
– sam
Oct 10 '13 at 1:47
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Is it safe to delete a void pointer?
...native (delete
object), if the static type of the
operand is different from its dynamic
type, the static type shall be a base
class of the operand’s dynamic type
and the static type shall have a
virtual destructor or the behavior is
undefined. In the second alternative
(delete arr...
Should I use int or Int32
...ommendation. They rewrote the paragraph about aliases of simple types. So, from today perspective it is unclear what use is favored.
– SergICE
Aug 19 at 13:12
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Using a dispatch_once singleton model in Swift
...e and the nested struct approach if you need to support earlier versions.
From my experience with Swift there are three approaches to implement the Singleton pattern that support lazy initialization and thread safety.
Class constant
class Singleton {
static let sharedInstance = Singleton()
}
...
Different floating point result with optimization enabled - compiler bug?
...wide. Different optimization levels affect how often floating point values from CPU get saved into memory and thus rounded from 80-bit precision to 64-bit precision.
Use the -ffloat-store gcc option to get the same floating point results with different optimization levels.
Alternatively, use the l...
How to install Android SDK Build Tools on the command line?
I want to setup the Android dev environment from command line, and encounter the following issue:
19 Answers
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bash HISTSIZE vs. HISTFILESIZE?
...ntain HISTFILESIZE=10 lines.
You now have 10 commands in your history - 5 from a previous session and the last 5 that you just typed in the session you just finished.
When you start a new session, you start over at 1 with a HISTFILE of HISTFILESIZE=10.
Example 3:
HISTFILESIZE=5 and HISTSIZE=10
...