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How can I add a hint text to WPF textbox?
...nt="Please enter your text" not 20 elements... Alas, this is not supported by the legendary built in text box...
– Mzn
Nov 29 '14 at 12:54
8
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How do I print a double value without scientific notation using Java?
...ic notations if double is less than 10^-3 or greater than or equal to 10^7
By using %f, the default decimal precision is 6, otherwise you can hardcode it, but it results in extra zeros added if you have fewer decimals. Example:
double myValue = 0.00000021d;
String.format("%.12f", myvalue); // Outpu...
When to use an interface instead of an abstract class and vice versa?
...his class has written a generic algorithm and intends for people to use it by "specializing" it by providing their own "hooks" - in this case, a "compare" method.
So the intended usage is something like this:
class NameSorter : QuickSorter
{
public bool compare(object lhs, object rhs)
{
...
Python JSON serialize a Decimal object
...ps(Decimal('3.9'), use_decimal=True)
'3.9'
Note that use_decimal is True by default:
def dumps(obj, skipkeys=False, ensure_ascii=True, check_circular=True,
allow_nan=True, cls=None, indent=None, separators=None,
encoding='utf-8', default=None, use_decimal=True,
namedtuple_as_object=Tr...
Better way of getting time in milliseconds in javascript?
... I am having some problems with the reliability of the exact time returned by this object.
5 Answers
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Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
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@ShaunBudhram By the looks of it nope. I haven't seen any difference. It will only make a difference in apps that use the CPU heavily - games for example would see a benefit compiling for 64 bit.
– Robert J. Clegg
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How do I detect that an iOS app is running on a jailbroken phone?
...
It depends what you mean by jailbreak. In the simple case, you should be able to see if Cydia is installed and go by that - something like
NSString *filePath = @"/Applications/Cydia.app";
if ([[NSFileManager defaultManager] fileExistsAtPath:filePat...
What is a daemon thread in Java?
... setDamon(boolean) can only be called before the thread has been started. By default the thread inherits the daemon status of its parent thread.
– Gray
Nov 30 '11 at 13:47
1
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Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
.... And even the worker thread with the inter-thread queue slows things down by a factor of 20 or so on Fedora 25 in a VM, and by about 8 on native OS X.
I created a Bitbucket project holding the code I used for the performance test. It can be found here: https://bitbucket.org/omnifarious/launch_thre...
Clojure: reduce vs. apply
...wn. A good example of the latter scenario occuring in practice is provided by str: it uses a StringBuilder internally and will benefit significantly from the use of apply rather than reduce.
So, I'd say use apply when in doubt; and if you happen to know that it's not buying you anything over reduce...