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Android: how to check if a View inside of ScrollView is visible?
...{
@Override
public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
if (myBtn1 != null) {
if (myBtn1.getLocalVisibleRect(scrollBounds)) {
if (!myBtn1.getLocalVisibleRect(scrollBounds)...
NodeJS: Saving a base64-encoded image to disk
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I think you are converting the data a bit more than you need to. Once you create the buffer with the proper encoding, you just need to write the buffer to the file.
var base64Data = req.rawBody.replace(/^data:image\/png;base64,/, "");
requ...
`levels
...The code is simply setting up a sort of pipeline:
Start with dat$product
Convert it to a factor
Change the levels
Store that in res
Personally, I think that line of code is beautiful ;)
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Why is there no std::stou?
...std::sto* functions mirror strto*, and the std::to_string functions use sprintf.
Edit: As KennyTM points out, both stoi and stol use strtol as the underlying conversion function, but it is still mysterious why while there exists stoul that uses strtoul, there is no corresponding stou.
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How do I Sort a Multidimensional Array in PHP [duplicate]
...ompared in a "dumb" manner (e.g. date strings) you can also specify how to convert these items to a value that can be directly compared (e.g. a DateTime instance).
It's associative if you want: this code takes care of sorting items, but you select the actual sort function (usort or uasort).
Finally,...
UITableViewHeaderFooterView: Unable to change background color
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You should either use myTableViewHeaderFooterView.tintColor, or assign a custom background view to myTableViewHeaderFooterView.backgroundView.
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Is Integer Immutable
I know this is probably very stupid, but a lot of places claim that the Integer class in Java is immutable, yet the following code:
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How to debug stream().map(…) with lambda expressions?
...sually have no problem debugging lambda expressions while using Eclipse or IntelliJ IDEA. Just set a breakpoint and be sure not to inspect the whole lambda expression (inspect only the lambda body).
Another approach is to use peek to inspect the elements of the stream:
List<Integer> natur...
How to construct a REST API that takes an array of id's for the resources
...bly one of the closest to the concept since it accomplishes all the constraints described here: en.wikipedia.org/wiki/…. You would only use CSV to represent arrays in requests, while the service responses should be serialized using XML or JSON. Are there any particular reasons why you don't consid...
Best practices for overriding isEqual: and hash
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Start with
NSUInteger prime = 31;
NSUInteger result = 1;
Then for every primitive you do
result = prime * result + var
For objects you use 0 for nil and otherwise their hashcode.
result = prime * result + [var hash];
For boolean...