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How to access environment variable values?
I set an environment variable that I want to access in my Python application. How do I get its value?
12 Answers
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How can I change the image displayed in a UIImageView programmatically?
...o a UIImageView already, then all you have to do is grab an image and call setImage on the receiver (UIImageView). Two examples of grabbing an image are below. One from the Web, and one you add to your Resources folder in Xcode.
UIImage *image = [[UIImage alloc] initWithData:[NSData dataWithContent...
After submitting a POST form open a new window showing the result
...
Add
<form target="_blank" ...></form>
or
form.setAttribute("target", "_blank");
to your form's definition.
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What's the difference between git reflog and log?
...y lose data from your repo once it's been committed. If you accidentally reset to an older commit, or rebase wrongly, or any other operation that visually "removes" commits, you can use the reflog to see where you were before and git reset --hard back to that ref to restore your previous state. Reme...
How do I update a Linq to SQL dbml file?
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You could also check out the PLINQO set of code generation templates, based on CodeSmith, which allow you to do a lot of neat things for and with Linq-to-SQL:
generate one file per class (instead of a single, huge file)
update your model as needed
many more f...
Combining multiple commits before pushing in Git [duplicate]
... It should say "find the commit ID of the commit just prior to the set of commits you want to squash into one".
– BenjaminBallard
Nov 9 '17 at 19:44
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bootstrap button shows blue outline when clicked
...though not in Firefox). I've found out that the outline property was being set by Bootstrap as outline: 5px auto -webkit-focus-ring-color;. Solved by overriding the outline property later in my custom CSS as follows:
.btn.active.focus, .btn.active:focus, .btn.focus, .btn:active.focus, .btn:active:f...
Insert HTML with React Variable Statements (JSX)
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You can use dangerouslySetInnerHTML, e.g.
render: function() {
return (
<div className="content" dangerouslySetInnerHTML={{__html: thisIsMyCopy}}></div>
);
}
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error_log per Virtual Host?
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To set the Apache (not the PHP) log, the easiest way to do this would be to do:
<VirtualHost IP:Port>
# Stuff,
# More Stuff,
ErrorLog /path/where/you/want/the/error.log
</VirtualHost>
If there is no leadi...
How do you find all subclasses of a given class in Java?
...(new AssignableTypeFilter(MyClass.class));
// scan in org.example.package
Set<BeanDefinition> components = provider.findCandidateComponents("org/example/package");
for (BeanDefinition component : components)
{
Class cls = Class.forName(component.getBeanClassName());
// use class cls f...