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How to generate unique ID with node.js
How to set a variable value with database query callback? How I can do it?
13 Answers
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Sorting list based on values from another list?
...air: pair[0])]
Explained:
zip the two lists.
create a new, sorted list based on the zip using sorted().
using a list comprehension extract the first elements of each pair from the sorted, zipped list.
For more information on how to set\use the key parameter as well as the sorted function in ge...
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...
How to keep environment variables when using sudo
...d
sudo VAR1="$VAR1" ... VAR42="$VAR42" "$@" was long and ugly in my case
demo.sh
#!/bin/bash
function sudo_exports(){
eval sudo $(for x in $_EXPORTS; do printf '%q=%q ' "$x" "${!x}"; done;) "$@"
}
# create a test script to call as sudo
echo 'echo Forty-Two is $VAR42' > sudo_test.sh
chmod...
jquery save json data object in cookie
...lead to a bug in some browsers.
Before using it, you should convert it to base64 (using btoa), and when reading it, convert from base64 (using atob).
val = JSON.stringify(userData)
val = btoa(val)
write_cookie(val)
share...
Convert timestamp to date in MySQL query
... format use date_format
date_format(registration, '%Y-%m-%d')
SQLFiddle demo
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Retrieve list of tasks in a queue in Celery
...'re using Redis. To get the task counts:
redis-cli -h HOST -p PORT -n DATABASE_NUMBER llen QUEUE_NAME
But, prioritized tasks use a different key in redis, so the full picture is slightly more complicated. The full picture is that you need to query redis for every priority of task. In python (and ...
How to use UIVisualEffectView to Blur Image?
...UI Elements. It gives me full landscape support, too. I have made a little demo of using UIVisualEffects with Blur and also Vibrancy.
Demo on Github
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CentOS 64 bit bad ELF interpreter
...-bit system, and don't have 32-bit library support installed.
To install (baseline) support for 32-bit executables
(if you don't use sudo in your setup read note below)
Most desktop Linux systems in the Fedora/Red Hat family:
pkcon install glibc.i686
Possibly some desktop Debian/Ubuntu syste...
Reading an image file into bitmap from sdcard, why am I getting a NullPointerException?
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I wrote the following code to convert an image from sdcard to a Base64 encoded string to send as a JSON object.And it works great:
String filepath = "/sdcard/temp.png";
File imagefile = new File(filepath);
FileInputStream fis = null;
try {
fis = new FileInputStream(imagefile);
} ...