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How to do associative array/hashing in JavaScript
..."all modern browsers support Map." Only on the desktop can you count on at least basic Map support. Not on mobile devices. E.g., Android browser has no Map support at all. Even on the Desktop, some implementations are incomplete. For instance, IE11 still doesn't support enumerating via "for...of......
How can I index a MATLAB array returned by a function without first assigning it to a local variable
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At least in MATLAB 2013a you can use getfield like:
a=rand(5);
getfield(a,{1,2}) % etc
to get the element at (1,2)
share
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Programmatically obtain the Android API level of a device?
...the following way (it will execute if the current device's API level is at least 4)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.DONUT) {
}
To obtain user visible Android Version use:
Build.VERSION.RELEASE
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Does a `+` in a URL scheme/host/path represent a space?
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To get a literal + to be received by the back end (or, at least PHP) it has to be triple encoded: %25252B
– Umbrella
Sep 30 '15 at 15:01
11
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Show current assembly instruction in GDB
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@fuz present at least in GDB 8.1 in Ubuntu 18.04.
– Ciro Santilli 郝海东冠状病六四事件法轮功
Jul 19 '18 at 22:45
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Python logging: use milliseconds in time format
...tion of ct to make it a datetime object instead of a struct_time, then (at least with modern versions of Python) we can call ct.strftime and then we can use %f to format microseconds:
import logging
import datetime as dt
class MyFormatter(logging.Formatter):
converter=dt.datetime.fromtimestamp...
What is thread contention?
...access either the same resource or related resources in such a way that at least one of the contending threads runs more slowly than it would if the other thread(s) were not running.
The most obvious example of contention is on a lock. If thread A has a lock and thread B wants to acquire that same ...
Check whether an array is a subset of another
...nq is working back to forth. Any() is asking an IEnumerable if there is at least one element. In this scenario t2.Except(t1) is only emitting the first element of t2 which is not in t1. If the first element of t2 is not in t1 it finishes fastest, if all elements of t2 are in t1 it runs the longest.
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Calling a static method on a generic type parameter
...tely you can't enforce that the class has the right method, but you can at least compile-time-enforce that the resulting factory method has everything it expects (i.e an initialization method with exactly the right signature). This is better than a run time reflection exception.
This approach also ...
Rounding up to next power of 2
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The cost of this is probably at least 200 cycles and it's not even correct. Why does this have so many upvotes?
– Axel Gneiting
Aug 18 '15 at 20:17
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