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Random float number generation
... employ a more advanced method.
This will generate a number from 0.0 to 1.0, inclusive.
float r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
This will generate a number from 0.0 to some arbitrary float, X:
float r2 = static_cast <float> (rand()) / (static...
Where are my postgres *.conf files?
...1h
#checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0
#checkpoint_warning = 30s # 0 disables
# - Archiving -
#archive_mode = off # allows archiving to be done
# (change requires restart)
#archive_command = '' # command to use to archive a lo...
Do Git tags only apply to the current branch?
...
If you create a tag by e.g.
git tag v1.0
the tag will refer to the most recent commit of the branch you are currently on. You can change branch and create a tag there.
You can also just refer to the other branch while tagging,
git tag v1.0 name_of_other_bran...
Determine the line of code that causes a segmentation fault?
...en if that memory area was accessible to the process.
¹ That is Clang 3.1+ and GCC 4.8+.
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How to change shape color dynamically?
...n specify backgroundTint for the ImageView.
circle.xml
<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
</shape>
And in your layout:
<ImageView
android:layout_width="50dp"
android:...
Asynchronous vs Multithreading - Is there a difference?
...synchronous processing since the non preemptive times (versions 2.13, 3.0, 3.1, etc) using the message loop, way before supporting real threads. So to answer your question, no, it is not necessary to create a thread to perform asynchronous processing.
...
Bash Templating: How to build configuration files from templates with Bash?
...
NOTE: Apparently a there was a change from bash 3.1 to 3.2 (and up) in which the single quotes around the regex - treat the contents of the regex as a string literal. So the regex above should be... (\$\{[a-zA-Z_][a-zA-Z_0-9]*\}) stackoverflow.com/questions/304864/…
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libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...zhu@vip.qq.com
# FileName: test_download.cpp
# Version: 1.0
# LastChange: 2010-03-09 14:20:44
# Description:
# History:
============================================*/
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include “...
What is a “callable”?
...t call it and catch TypeError later. callable is removed in Python 3.0 and 3.1, use callable = lambda o: hasattr(o, '__call__') or isinstance(o, collections.Callable).
Example, a simplistic cache implementation:
class Cached:
def __init__(self, function):
self.function = function
...
Formula to determine brightness of RGB color
...ewhere...
Step One:
Convert all sRGB 8 bit integer values to decimal 0.0-1.0
vR = sR / 255;
vG = sG / 255;
vB = sB / 255;
Step Two:
Convert a gamma encoded RGB to a linear value. sRGB (computer standard) for instance requires a power curve of approximately V^2.2, though the "accurate" tr...