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How can I multiply and divide using only bit shifting and adding?
...n of arbitrary numbers, not the division by a constant number, then this thread might be of use: https://stackoverflow.com/a/12699549/1182653
EDIT2:
One of the fastest ways to divide by integer constants is to exploit the modular arithmetics and Montgomery reduction: What's the fastest way to divi...
Tab key == 4 spaces and auto-indent after curly braces in Vim
...ndtab
The help files take a bit of time to get used to, but the more you read, the better Vim gets:
:help smartindent
Even better, you can embed these settings in your source for portability:
:help auto-setting
To see your current settings:
:set all
As graywh points out in the comments, s...
Altering a column: null to not null
...
This doesn't answer the problem. The default is already set, it's the NOT NULL which needs to be changed. With only your answer, all existing records will stay NULL and the problem remains.
– PandaWood
Aug 26 '15 at 0:16
...
Make xargs handle filenames that contain spaces
...
The xargs utility reads space, tab, newline and end-of-file delimited strings from the standard input and executes utility with the strings as arguments.
You want to avoid using space as a delimiter. This can be done by changing the delimiter...
Can you grab or delete between parentheses in vi/vim?
... for "extended % matching" that you can find on the Vim homepage.
You can read the documentation on % and related motion commands by entering :help various-motions in command mode.
object-select
There is another set of motion commands that you can use in Visual mode to select various text objects...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...过如下方法来调整「cwnd」初始值：
shell> ip route | while read p; do
ip route change $p initcwnd 10;
done
需要提醒的是片面的提升发送端「cwnd」的大小并不一定有效，这是因为前面我们说过网络中实际传输的未经确认的数据...
Spring MVC: How to return image in @ResponseBody?
....59/tmpFiles/1.jpg", "r");
byte[] b = new byte[(int)f.length()];
f.readFully(b);
final HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.IMAGE_PNG);
return new ResponseEntity<byte[]>(b, headers, HttpStatus.CREATED);
}
Worked For Me.
...
Cleaning up the iPhone simulator
...ght change my schema, but the new database won't get copied, because one already exists.
15 Answers
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Java - How to create new Entry (key, value)
...e.
You said:
I can't use Map.Entry itself because apparently it's a read-only object that I can't instantiate new instanceof
That's not entirely accurate. The reason why you can't instantiate it directly (i.e. with new) is because it's an interface Map.Entry.
Caveat and tip
As noted in ...
Histogram using gnuplot?
...to create a histogram (just use "with boxes") in gnuplot if my .dat file already has properly binned data. Is there a way to take a list of numbers and have gnuplot provide a histogram based on ranges and bin sizes the user provides?
...