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How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
...Activity):
public String getFileName(Uri uri) {
String result = null;
if (uri.getScheme().equals("content")) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
try {
if (cursor != null && cursor.moveToFirst()) {
result = cursor.getString(cur...
Can Python test the membership of multiple values in a list?
I want to test if two or more values have membership on a list, but I'm getting an unexpected result:
10 Answers
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Check if a value is an object in JavaScript
How do you check if a value is an object in JavaScript?
46 Answers
46
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In Typescript, How to check if a string is Numeric
...) // 1234
Number('9BX9') // NaN
You can also use the unary plus operator if you like shorthand:
+'1234' // 1234
+'9BX9' // NaN
Be careful when checking against NaN (the operator === and !== don't work as expected with NaN). Use:
isNaN(maybeNumber) // returns true if NaN, otherwise false
...
Why does Double.NaN==Double.NaN return false?
...
NaN means "Not a Number".
Java Language Specification (JLS) Third Edition says:
An operation that overflows produces a signed infinity, an operation that underflows produces a denormalized value or a signed zero, and an operation that has no mathematically definite...
How to convert UTF-8 byte[] to string?
...
One of the beautiful features of UTF-8 is that a shorter sequence is never a subsequence of a longer sequence. So a null terminated UTF-8 string is simple.
– plugwash
Nov 24 '15 at 17:00
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How to get Twitter-Bootstrap navigation to show active link?
... understanding how Twitter Bootstrap does active links for the navigation. If I have a regular navigation like this (with ruby on rails linking):
...
How should I handle “No internet connection” with Retrofit on Android
...
public Response execute(Request request) throws IOException {
if (!ncm.isConnected()) {
log.debug("No connectivity %s ", request);
throw new NoConnectivityException("No connectivity");
}
return wrappedClient.execute(request);
}
}
and then us...
What is an NP-complete in computer science?
..."choice" function). Basically, a solution has to be testable in poly time. If that's the case, and a known NP problem can be solved using the given problem with modified input (an NP problem can be reduced to the given problem) then the problem is NP complete.
The main thing to take away from an NP...
Using ThreadPool.QueueUserWorkItem in ASP.NET in a high traffic scenario
...hread pool used for QueueUserWorkItem is also used to serve requests.
But if you are actually queuing enough work items to cause this starvation, then you should be starving the thread pool! If you are running literally hundreds of CPU-intensive operations at the same time, what good would it do t...