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Best Practice: Initialize JUnit class fields in setUp() or at declaration?
...eption, testEmptyCollection, and the like. The perspective there is of someone writing a class and making sure it works right.
You should probably do the same when testing your own classes: create your object in setUp or in a test method, so that you'll be able to get reasonable output if you break...
Key existence check in HashMap
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This is the HashMap source code.
Resources :
HashMap source code Bad one
HashMap source code Good one
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How to call an external command?
... Hello World").read()
but it is nice to have all of the options there in one unified class instead of 4 different popen functions. See the documentation.
The call function from the subprocess module. This is basically just like the Popen class and takes all of the same arguments, but it simply w...
Find location of a removable SD card
...s of this, particularly if you want the low-level details.
Second, lest anyone quibble on whether or not removable media access is otherwise part of the Android SDK, here is Dianne Hackborn's assessment:
...keep in mind: until Android 4.4, the official Android platform has not supported SD cards at...
DLL and LIB files - what and why?
...sometimes called 'archives' for this reason.
Dynamic libraries take this one step further. It seems wasteful to have multiple copies of the library functions taking up space in each of the programs. Why can't they all share one copy of the function? This is what dynamic libraries are for. Rather t...
What is a covariant return type?
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Covariant return, means that when one overrides a method, the return type of the overriding method is allowed to be a subtype of the overridden method's return type.
To clarify this with an example, a common case is Object.clone() - which is declared to retu...
How to make a flat list out of list of lists?
...the previous intermediate result must be copied over (as well as a few new ones added at the end). So, for simplicity and without actual loss of generality, say you have L sublists of I items each: the first I items are copied back and forth L-1 times, the second I items L-2 times, and so on; total ...
How to remove a file from the index in git?
...iles or directories to .gitignore, stage and commit as normal. They'll be gone from the repo but remain untouched in your local tree, and you won't accidentally check them in again.
– Ionoclast Brigham
Dec 7 '14 at 6:27
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Best practice to call ConfigureAwait for all server-side code
...l thread context.
This is true with UI applications, where there is only one UI thread that you have to "sync" back to.
In ASP.NET, the situation is a bit more complex. When an async method resumes execution, it grabs a thread from the ASP.NET thread pool. If you disable the context capture using...
How can I reload .emacs after changing it?
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Very strange that the very convenient
M-x eval-buffer
is not mentioned here.
It immediately evaluates all code in the buffer, its the quickest method, if your .emacs is idempotent.
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