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How to determine height of UICollectionView with FlowLayout
...y question: I was completely searching in the wrong place, digging through all the documentation I could find on UICollectionView.
The simple and easy solution lies in the underlying layout: Just call collectionViewContentSize on your myCollectionView.collectionViewLayout property and you get the h...
How to get the original value of an attribute in Rails
...
Before rails 5.1
Appending _was to your attribute will give you the previous value.
For rails 5.1+
Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should ap...
onKeyPress Vs. onKeyUp and onKeyDown
...eld 'down'.
onkeyup is fired when the key is released (including modifier/etc keys)
onkeypress is fired as a combination of onkeydown and onkeyup, or depending on keyboard repeat (when onkeyup isn't fired). (this repeat behaviour is something that I haven't tested. If you do test, add a comment!)
...
No route matches [GET] /assets
...nment. I ran RAILS_ENV=production rake assets:precompile which generated all of my assets in /public/assets. The problem is that when I start my app w/ RAILS_ENV=production rails s thin I get:
...
How to get the path of the batch script in Windows?
... double quotation marks ("") in case there's spaces in the directory name, etc.
– Cameron
Sep 30 '10 at 3:56
1
...
Fundamental difference between Hashing and Encryption algorithms
...'t work as well in practice because of re-encoding, changing file headers, etc, but it's an example use-case).
Use a hash function when you're checking validity of input data. That's what they are designed for. If you have 2 pieces of input, and want to check to see if they are the same, run both...
Is there a read-only generic dictionary available in .NET?
...lt;TKey, TValue>
{
private readonly IDictionary<TKey, TValue> _dictionary;
public ReadOnlyDictionary()
{
_dictionary = new Dictionary<TKey, TValue>();
}
public ReadOnlyDictionary(IDictionary<TKey, TValue> dictionary)
{
_dictionary = dict...
Android Studio doesn't see device
... edit adb_usb.ini, restart computer+device+swap usb port, reinstall studio etc. etc.) I just couldnt get it to work, and could not even detect my device using 'adb devices'. Finally after about 2 hours of googling and testing, someone suggested switching to PTP instead of MTP on my device. When I d...
How can I count text lines inside an DOM element? Can I?
...:
var element = document.getElementById('content');
document.defaultView.getComputedStyle(element, null).getPropertyValue("lineHeight");
You will also need to take padding and inter-line spacing into account.
EDIT
Fully self-contained test, explicitly setting line-height:
function countLin...
Why is “throws Exception” necessary when calling a function?
...ile specified by user is not readable, or no network connection available, etc., In all these cases, our program doesn't need to exit, instead it can take actions like alerting the user, or go into a fallback mechanism(like offline working when network not available), etc.
Unchecked Exceptions: The...