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When should null values of Boolean be used?
... in a collection (List, Map, etc.)
to represent a nullable boolean (coming from a nullable boolean column in a database, for example). The null value might mean "we don't know if it's true or false" in this context.
each time a method needs an Object as argument, and you need to pass a boolean value...
What is an API key? [closed]
...ions based on who's performing the request. For companies which make money from selling such services, it's also a way of tracking who's using the thing for billing purposes. Further still, by blocking a key, you can partially prevent abuse in the case of too-high request volumes.
In general, if yo...
How to skip over an element in .map()?
...;
}
return result;
}, []);
In that version, the code in the .filter() from the first sample is part of the .reduce() callback. The image source is only pushed onto the result array in the case where the filter operation would have kept it.
update — This question gets a lot of attention, and I...
iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?
...ght) {
e.currentTarget.scrollTop -= 1;
}
});
// Stops preventDefault from being called on document if it sees a scrollable div
$('body').on('touchmove', selScrollable, function(e) {
e.stopPropagation();
});
Note that this won't work if you want to block whole page scrolling when a div does...
How to find list of possible words from a letter matrix [Boggle Solver]
...'ll post it because it looks a bit faster than the other Python solutions, from setting up the dictionary faster. (I checked this against John Fouhy's solution.) After setup, the time to solve is down in the noise.
grid = "fxie amlo ewbx astu".split()
nrows, ncols = len(grid), len(grid[0])
# A dic...
Odd behavior when Java converts int to byte?
... bit (and we set the sign bit to 0 which is positive), the original 8 bits from the byte are read by Java as a positive value.
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How to dynamically compose an OR query filter in Django?
From an example you can see a multiple OR query filter:
13 Answers
13
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How to go from Blob to ArrayBuffer
...
The Response API consumes a (immutable) Blob from which the data can be retrieved in several ways. The OP only asked for ArrayBuffer, and here's a demonstration of it.
var blob = GetABlobSomehow();
// NOTE: you will need to wrap this up in a async block first.
/* Use ...
Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed
...
I had the same issue. Changing the parent class of my PageAdapter from android.support.v4.app.FragmentPagerAdapter to android.support.v4.app.FragmentStatePagerAdapter solve my ViewPager display issue on "second time"!
...
When to encode space to plus (+) or %20?
... The browser will create a query+name=query+value parameter from a form with <input name="query name" value="query value">. It will not create query%20name from a form, but it's totally safe to use that instead, eg. if you're putting a form submission together youself for an XML...