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Conditional Variable vs Semaphore
When should one use a semaphore and when should one use a conditional variable (CondVar) ?
6 Answers
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Is it possible to set the equivalent of a src attribute of an img tag in CSS?
...
Use content:url("image.jpg").
Full working solution (Live Demo):
<!doctype html>
<style>
.MyClass123{
content:url("http://imgur.com/SZ8Cm.jpg");
}
</style>
<img class="MyClass123"/>
Tested and working:
Chrome 14....
AngularJS ng-if with multiple conditions
... ng-if="key == 'City' || key == 'County'">
<pre>City or County !!! {{$parent.localityTypeRadio}}</pre>
</div>
<div ng-if="key == 'Town'">
<pre>Town!!! {{$parent.localityTypeRadio}}</pre>
</div>
...
Which is the preferred way to concatenate a string in Python?
...'s string can't be changed, I was wondering how to concatenate a string more efficiently?
12 Answers
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Credit card expiration dates - Inclusive or exclusive?
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It took me a couple of minutes to find a site that I could source for this.
The card is valid until the last day of the month indicated, after the last [sic]1
day of the next month; the card cannot be used to make a purchase if the
merchant attempts to obtain an authorization.
- S...
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
... is gaining the ability to ssh into the device from outside my local network. For whatever reason, this is proving to be impossible and I haven't the slightest clue why. When I try to ssh into my server with user@hostname , I get the error:
...
What is the proper way to test if a parameter is empty in a batch file?
I need to test if a variable is set or not. I've tried several techniques but they seem to fail whenever %1 is surrounded by quotes such as the case when %1 is "c:\some path with spaces" .
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What exactly is Hot Module Replacement in Webpack?
...load.
Documentation
Prerequirements:
Using Plugins: https://webpack.js.org/concepts/plugins/
Code Splitting: https://webpack.js.org/guides/code-splitting/
webpack-dev-server: https://webpack.js.org/configuration/dev-server/
It's not so much for HMR, but here are the links:
Example: https://w...
Why do x86-64 systems have only a 48 bit virtual address space?
... 256 terabyte. That's a lot. You're not going to see a system which needs more than that any time soon.
So CPU manufacturers took a shortcut. They use an instruction set which allows a full 64-bit address space, but current CPUs just only use the lower 48 bits. The alternative was wasting transisto...
css3 transition animation on load?
...o place using CSS3 only:
@keyframes slideInFromLeft {
0% {
transform: translateX(-100%);
}
100% {
transform: translateX(0);
}
}
header {
/* This section calls the slideInFromLeft animation we defined above */
animation: 1s ease-out 0s 1 slideInFromLeft;
background: #3...