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How to check if current thread is not main thread
...eturn null if the thread is not associated with a Looper. So both are safe and have the same result but the first one is a little bit slower while it searches inside a map to find out the looper and its associated thread and do some other stuff .
– Saeed Masoumi
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Difference between Big-O and Little-O Notation
...it still has a lim sup: 4.)
I recommend memorizing how the Big-O notation converts to asymptotic comparisons. The comparisons are easier to remember, but less flexible because you can't say things like nO(1) = P.
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restrict edittext to single line
possible duplicate : android-singleline-true-not-working-for-edittext
23 Answers
23
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What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...pha Transparency for PNG-8 files. (Damn you, Photoshop!) There are ways to convert Photoshop PNG-24 to PNG-8 files while retaining their transparency, though. One method is PNGQuant, another is to save your files with Fireworks.
PNG-24 - Lossless / Direct
PNG-24 is a great format that combines L...
Separate REST JSON API server and client? [closed]
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I'm currently working on converting a huge CMS from option 1 to option 3, and it's going well. We chose to render the markup server-side because SEO is a big deal to us, and we want the sites to perform well on mobile phones.
I'm using node.js for t...
Remove all spaces from a string in SQL Server
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Reference taken from this blog:
First, Create sample table and data:
CREATE TABLE tbl_RemoveExtraSpaces
(
Rno INT
,Name VARCHAR(100)
)
GO
INSERT INTO tbl_RemoveExtraSpaces VALUES (1,'I am Anvesh Patel')
INSERT INTO tbl_RemoveExtraSpaces VALUES (2,'Database Rese...
Order a MySQL table by two columns
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Odd. When I have two columns, the name and total and want to order alphabetically by name and DESC by total, then I see only, that it was ordered by name, but not by total
– Eugene
May 3 '12 at 9:20
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const char* concatenation
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In your example one and two are char pointers, pointing to char constants. You cannot change the char constants pointed to by these pointers. So anything like:
strcat(one,two); // append string two to string one.
will not work. Instead you sh...
Test if object implements interface
...eding to cast afterward with the first one thus giving you two casts ("is" and then an explicit cast). With the second approach you only cast once.
– Andrew Hare
Jan 4 '09 at 6:02
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How can I generate Unix timestamps?
...tOS host (SunOS 5.11 joyent_20171026T003127Z), I've both /usr/bin/date +%s and /usr/xpg4/bin/date +%s` working. Combined with the POSIX.2 recommendation, I think this works on all Solaris too.
– Dereckson
Nov 5 '17 at 17:21
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