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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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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...
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...
Circular list iterator in Python
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Use itertools.cycle, that's its exact purpose:
from itertools import cycle
lst = ['a', 'b', 'c']
pool = cycle(lst)
for item in pool:
print item,
Output:
a b c a b c ...
(Loops forever, obviously)
In order to manually advance the iterator and pull values from it one by one, s...
Use URI builder in Android or create URL with variables
I'm developing an Android app. I need to build a URI for my app to make an API request. Unless there's another way to put a variable in a URI, this is the easiest way I've found. I found that you need to use Uri.Builder , but I'm not quite sure how to. My url is:
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AngularJS: Injecting service into a HTTP interceptor (Circular dependency)
I'm trying to write a HTTP interceptor for my AngularJS app to handle authentication.
5 Answers
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How to get Core Data object from specific Object ID?
I can easily get an object's ID in Core Data using the following code:
3 Answers
3
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What is the syntax for “not equal” in SQLite?
I want to return the cursor that points anything that are NOT onSale, what should I change? Thanks!
3 Answers
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