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Which is better, return value or out parameter?
...131(VS.80).aspx
If you find yourself needing to return two things from an API then wrapping them up in a struct/class would be better than an out param.
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Run a callback only if an attribute has changed in Rails
...se changes: https://www.ombulabs.com/blog/rails/upgrades/active-record-5-1-api-changes.html
Here is the summary I made for myself on the changes to ActiveRecord::Dirty in Rails 5.1+:
ActiveRecord::Dirty
https://api.rubyonrails.org/classes/ActiveRecord/AttributeMethods/Dirty.html
Before Saving (O...
How to handle button clicks using the XML onClick within Fragments
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This doesn't work with API 21 in my project. Any thoughts on how to use this approach?
– Darth Coder
Mar 10 '15 at 17:45
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SparseArray vs HashMap
...e based on objects not on primitive so it wont work within the Collections API
– Rod_Algonquin
Aug 29 '14 at 3:00
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Python, Unicode, and the Windows console
...ll now accept all Unicode characters. Internally, it uses the same Unicode API as the win-unicode-console package mentioned below. print(unicode_string) should just work now.
I get a UnicodeEncodeError: 'charmap' codec can't encode character... error.
The error means that Unicode character...
When to use a Content Provider
...ctural changes. Besides, it's nice to be able to re-use the same standard API for accessing data rather than littering your code with low-level access to the database.
Also, there is always the chance that you might want to expose your data in the future. If you don't use a ContentProvider up fron...
Android adding simple animations while setvisibility(view.Gone)
...e to manually add animations. For this I suggest you use the new animation API introduced in Android 3.0 (Honeycomb). I can give you a few examples:
This fades out a View:
view.animate().alpha(0.0f);
This fades it back in:
view.animate().alpha(1.0f);
This moves a View down by its height:
vie...
Create a File object in memory from a string in Java
...s another method nearby that accepts a stream. If this isn't the case, the API is badly coded. Otherwise, you can use temporary files, where permission is usually granted in many cases. If it's applet, you can request write permission.
An example:
try {
// Create temp file.
File temp = Fil...
How can I be notified when an element is added to the page?
...ctical guide to using MutationObserver(): davidwalsh.name/mutationobserver-api
– gfullam
Feb 19 '16 at 19:26
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Is a Java string really immutable?
...ng is immutable* but this only means you cannot change it using its public API.
What you are doing here is circumventing the normal API, using reflection. The same way, you can change the values of enums, change the lookup table used in Integer autoboxing etc.
Now, the reason s1 and s2 change val...