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Explain Python entry points?
...en called from the command line, parse the arguments that the user has provided, and ... well, do whatever the command is designed to do.
Install the docutils package for a great example of entry-point use: it will install something like a half-dozen useful commands for converting Python documentat...
How do I print out the contents of an object in Rails for easy debugging?
...rails -s
results (in browser)
- !ruby/object:Post
raw_attributes:
id: 2
title: My Second Post
body: Welcome! This is another example post
published_at: '2015-10-19 23:00:43.469520'
created_at: '2015-10-20 00:00:43.470739'
updated_at: '2015-10-20 00:00:43.470739'
attri...
How to determine the current shell I'm working on
...
ps -ef | grep $$ | grep -v grep - this will look for the current process ID in the list of running processes. Since the current process is the shell, it will be included.
This is not 100% reliable, as you might have other processes whose ps listing includes the same number as shell's process ID, ...
How do you attach and detach from Docker's process?
... new process from the existing container:
sudo docker exec -ti [CONTAINER-ID] bash
will start a new process with bash shell, and you could escape from it by Ctrl+C directly, it won't affect the original process.
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Is is possible to check if an object is already attached to a data context in Entity Framework?
...
Here's what I ended up with, which works very nicely:
public static void AttachToOrGet<T>(this ObjectContext context, string entitySetName, ref T entity)
where T : IEntityWithKey
{
ObjectStateEntry entry;
// Track whether we need to perform an attach
bool attach = false;
...
Restricting input to textbox: allowing only numbers and decimal point
...->
</SCRIPT>
</HEAD>
<BODY>
<INPUT id="txtChar" onkeypress="return isNumberKey(event)"
type="text" name="txtChar">
</BODY>
</HTML>
This really works!
...
Java ArrayList replace at specific index
...thod is a static method which is not, is it ?
– Android Killer
Mar 17 '13 at 17:20
9
@AndroidKill...
Can I set an opacity only to the background image of a div?
...ght: 0;
background: url(test.jpg) center center;
opacity: .4;
width: 100%;
height: 100%;
}
See test case on jsFiddle
:before and ::before pseudo-element
Another trick is to use the CSS 2.1 :before or CSS 3 ::before pseudo-elements. :before pseudo-element is supported in IE from v...
What's “requestCode” used for on PendingIntent?
...ance later on (for cancelling, etc).
Yes, my guess is the alarms will override each other. I would keep the request codes unique.
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jQuery append fadeIn
...m you just added to it. Instead, construct your item first and apply the hide().fadeIn() before adding it:
$('#thumbnails')
.append($('<li><img src="/photos/t/'+data.filename+'"/></li>')
.hide()
.fadeIn(2000)
);
This uses the dollar function to construct...