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Determine if Python is running inside virtualenv
... If you're in a shell you can simply use [[ -n $VIRTUAL_ENV ]] && echo virtualenv or [[ -z $VIRTUAL_ENV ]] && echo not virtualenv depending on your needs.
– Six
Dec 29 '14 at 20:32
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How do I check if the Java JDK is installed on Mac?
...u can check if java is installed by the next way:
/usr/libexec/java_home &> /dev/null && echo "installed" || echo "not installed"
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How to fix Git error: object file is empty?
...set
Unstaged changes after reset:
M tex/MCMC-in-IRT.tex
M tex/recipe-example/build-example-plots.R
M tex/recipe-example/build-failure-plots.R
Step 11: Looking at the fsck again...
nathanvan@nathanvan-N61Jq:~/workspace/mcmc-chapter$ git fsck --full
Checking object directories: 100% (256/256)...
整合phpcms v9和discuz X3.2实现同步登陆、退出免激活 - 更多技术 - 清泛网...
整合phpcms v9和discuz X3.2实现同步登陆、退出免激活内容管理选择了phpcms v9，社区论坛选择了discuz X3 2，现在需要实现两个系统的同步注册、登陆、退出。discuz所属康盛公司为我们提供了解决方案，那就是通过UCenter实现多系统间通...
How to convert all tables from MyISAM into InnoDB?
...
<?php
// connect your database here first
//
// Actual code starts here
$sql = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = 'your_database_name'
AND ENGINE = 'MyIS...
How do you use the ? : (conditional) operator in JavaScript?
... = 'Hello ' + (username || 'guest');
This is Javascripts equivallent of PHP's shorthand ternary operator ?:
Or even:
var welcomeMessage = 'Hello ' + (username || something || maybethis || 'guest');
It evaluates the variable, and if it's false or unset, it goes on to the next.
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Can you run GUI applications in a Docker container?
...identical to the host system did not help in my case. xeyes (I like this example) simply would ignore the magic cookie and pass no credentials to the server. Hence we get an error message 'No protocol specified Cannot open display'
The Xauthority file can be written in a way so that the hostname do...
How do I catch an Ajax query post error?
...Since jQuery 1.5 you can use the deferred objects mechanism:
$.post('some.php', {name: 'John'})
.done(function(msg){ })
.fail(function(xhr, status, error) {
// error handling
});
Another way is using .ajax:
$.ajax({
type: "POST",
url: "some.php",
data: "name=John&l...
Differences between lodash and underscore [closed]
...onsible for raising more than 30 issues; landing bug fixes, new features, & perf gains in Underscore v1.4.x+.
In addition there are at least 3 Backbone boilerplates that include Lo-Dash by default and Lo-Dash is now mentioned in Backbone’s official documentation.
Check out Kit Cambridge's po...
Best way to parse RSS/Atom feeds with PHP [closed]
...ll formed. Are there any other options for parsing RSS and Atom feeds with PHP?
10 Answers
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