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this.setState isn't merging states as I would expect
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I think setState() doesn't do recursive merge.
You can use the value of the current state this.state.selected to construct a new state and then call setState() on that:
var newSelected = _.extend({}, this.state.selected);
newSelected.name = 'Barfoo';
this.setStat...
Does Java read integers in little endian or big endian?
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Use the network byte order (big endian), which is the same as Java uses anyway. See man htons for the different translators in C.
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How to read a single character from the user?
...ke getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
23 Answers
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Multiple line code example in Javadoc comment
I have a small code example I want to include in the Javadoc comment for a method.
15 Answers
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How do I sort an NSMutableArray with custom objects in it?
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Compare method
Either you implement a compare-method for your object:
- (NSComparisonResult)compare:(Person *)otherObject {
return [self.birthDate compare:otherObject.birthDate];
}
NSArray *sortedArray = [drinkDetails sortedAr...
What is the difference between print and puts?
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puts adds a new line to the end of each argument if there is not one already.
print does not add a new line.
For example:
puts [[1,2,3], [4,5,nil]] Would return:
1
2
3
4
5
Whereas print [[1,2,3], [4,5,nil]]
would return:
[[1,2,3], [4,5,nil]]
Notice how puts...
How to implement an ordered, default dict? [duplicate]
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The following (using a modified version of this recipe) works for me:
from collections import OrderedDict, Callable
class DefaultOrderedDict(OrderedDict):
# Source: http://stackoverflow.com/a/6190500/562769
def __init__(self, default_factory=None, *a, **kw):
if (default_fa...
Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
...s launchOptions: NSDictionary?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
var controller = UIViewController()
var view = UIView(frame: CGRectMake(0, 0, 320, 568))
view.backgroundColor = UIColor.redColor()
controller.view = view
var label = UIL...
Why does volatile exist?
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volatile is needed if you are reading from a spot in memory that, say, a completely separate process/device/whatever may write to.
I used to work with dual-port ram in a multiprocessor system in straight C. We used a hardware managed 16 bit value as a semaphore to know when th...
Google Maps v3 - limit viewable area and zoom level
...o limit Google map v3 to a certain area? I want to allow displaying only some area (e.g. a country) and disallow the user to slide elsewhere. Also I want to restrict the zoom level - e.g. only between levels 6 and 9. And I want to use all the base map types.
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