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How can I get the external SD card path for Android 4.0+?
...
In order to retrieve all the External Storages (whether they are SD cards or internal non-removable storages), you can use the following code:
final String state = Environment.getExternalStorageState();
if ( Environment.MEDIA_...
How to determine if binary tree is balanced?
...ion cost. You spend a lot of time doing unnecessary tree rearrangements in order to attain a level of balance that in practice makes little difference. Who cares if sometimes it takes forty branches to get to the farthest leaf in a million-node imperfectly-balanced tree when it could in theory take ...
Why should eval be avoided in Bash, and what should I use instead?
...>&3 2>&1 # Redirect stdout to &3, and stderr to stdout: order matters
command <&3 >&4 # Input and output!
Variable indirection
Scenario:
VAR='1 2 3'
REF=VAR
Bad:
eval "echo \"\$$REF\""
Why? If REF contains a double quote, this will break and open the code...
Python speed testing - Time Difference - milliseconds
What is the proper way to compare 2 times in Python in order to speed test a section of code? I tried reading the API docs. I'm not sure I understand the timedelta thing.
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Why is there no Tree class in .NET?
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Beware that elements are un-ordered this way
– Sebastian
Aug 2 '16 at 10:15
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Is there a better way to express nested namespaces in C++ within the header
...ESPACE_BEGIN(Foo, Bar, Baz)
class X { };
NAMESPACE_END(Baz, Bar, Foo) // order doesn't matter, NAMESPACE_END(a, b, c) would work equally well
Foo::Bar::Baz::X x;
For nesting deeper than three levels you would have to add helper macros up to the desired count.
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CSS last-child selector: select last-element of specific class, not last child inside of parent?
...t.
body {
background: black;
}
.comment {
width: 470px;
border-bottom: 1px dotted #f0f0f0;
margin-bottom: 10px;
}
.comment:last-of-type {
border-bottom: none;
margin-bottom: 0;
}
<div class="commentList">
<article class="comment " id="com21"></artic...
Is it safe to ignore the possibility of SHA collisions in practice?
...ty of such an event occurring in the next second to about 10-15. That's 45 orders of magnitude more probable than the SHA-256 collision. Briefly stated, if you find SHA-256 collisions scary then your priorities are wrong.
In a security setup, where an attacker gets to choose the messages which will...
When do I need to use a semicolon vs a slash in Oracle SQL?
...e 1:
ORA-00942: table or view does not exist
The / is mainly required in order to run statements that have embedded ; like a CREATE PROCEDURE statement.
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Declaring variables inside or outside of a loop
...f having to go all over your entire code base and tweak and hack things in order to squeeze clock cycles here and there.
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