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Height equal to dynamic width (CSS fluid layout) [duplicate]
...port width.
vw : 1/100th of the width of the viewport. (Source MDN)
DEMO
HTML:
<div></div>
CSS for a 1:1 aspect ratio:
div{
width:80vw;
height:80vw; /* same as width */
}
Table to calculate height according to the desired aspect ratio and width of element.
asp...
Can I install Python windows packages into virtualenvs?
... I tried to do this, but got an error wheel convert numpy-MKL-1.8.1.win-amd64-py2.7.exe then pip install numpy-1.8.1-cp27-none-win_amd64.whl i get the following error Downloading/unpacking numpy-1.8.1-cp27-none-win-amd64.whl Could not find any downloads that satisfy the requirement numpy-1.8.1-cp...
Linux C++ 单元测试与gcov代码覆盖率统计 - C/C++ - 清泛网 - 专注C/C++及内核技术
...--rc lcov_branch_coverage=1 -r xxx.tmp '/usr/include/*' '*lib/*' -o xxx
Demo shell:
g++ --coverage demo.cpp # demo.gcno
./a.out # demo.gcda
gcov demo # demo.cpp.gcov
cat demo.cpp.gcov
lcov --rc lcov_branch_coverage=1 -c -d . -o demo_lcov_report
#all
#genhtml --rc genhtml_branch_cover...
Different floating point result with optimization enabled - compiler bug?
...finite precision, or if you were working with a device that used a decimal-based rather than binary-based floating point representation. But, you aren't. Most computers use the binary IEEE floating point standard.
As Maxim Yegorushkin already noted in his answer, part of the problem is that intern...
Hadoop “Unable to load native-hadoop library for your platform” warning
...
I assume you're running Hadoop on 64bit CentOS. The reason you saw that warning is the native Hadoop library $HADOOP_HOME/lib/native/libhadoop.so.1.0.0 was actually compiled on 32 bit.
Anyway, it's just a warning, and won't impact Hadoop's functionalities.
...
Error to run Android Studio
..._91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Check what compiler is used
javac -version
It should show something like this
javac 1.8.0_91
Finally, add JAVA_HOME to the environment variable
Edit /etc/environment and...
Is there a replacement for unistd.h for Windows (Visual C)?
...t your app and consider whether to call e.g. closesocket(). */
#ifdef _WIN64
#define ssize_t __int64
#else
#define ssize_t long
#endif
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
/* should be in some equivalent to <sys/types.h> */
typedef __int8 int8_t;
...
Convert timestamp to date in MySQL query
... format use date_format
date_format(registration, '%Y-%m-%d')
SQLFiddle demo
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What is the difference between Cygwin and MinGW?
...for Windows.
About Cygwin
The purpose of Cygwin is to make porting Unix-based applications to Windows much easier, by emulating many of the small details that Unix-based operating systems provide, and are documented by the POSIX standards. Your application can use Unix feature such as pipes, Uni...
Hexadecimal To Decimal in Shell Script
... external program:
With bash:
$ echo $((16#FF))
255
with bc:
$ echo "ibase=16; FF" | bc
255
with perl:
$ perl -le 'print hex("FF");'
255
with printf :
$ printf "%d\n" 0xFF
255
with python:
$ python -c 'print(int("FF", 16))'
255
with ruby:
$ ruby -e 'p "FF".to_i(16)'
255
with node....