大约有 40,000 项符合查询结果（耗时：0.0386秒） [XML]
Make a float only show two decimal places
...ngFromNumber: [NSNumber numberWithFloat: myFloat]];
You may need to also set the negative format, but I think it's smart enough to figure it out.
share
|
improve this answer
|
...
Deleting all files in a directory with Python
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
lenses, fclabels, data-accessor - which library for structure access and mutation is better
...(a -> b) (b -> a -> a)
providing two functions: a getter, and a setter
get (Lens g _) = g
put (Lens _ s) = s
subject to three laws:
First, that if you put something, you can get it back out
get l (put l b a) = b
Second that getting and then setting doesn't change the answer
put l...
How to find the most recent file in a directory using .NET, and without looping?
... little extra work - just reference the System.Core.dll file from 3.5, and set it to "copy local"
– Scott Ivey
Jul 24 '09 at 21:19
8
...
Alternative timestamping services for Authenticode
...ning Script ;)
@echo off
REM create an array of timestamp servers...
set SERVERLIST=(http://timestamp.comodoca.com/authenticode http://timestamp.verisign.com/scripts/timestamp.dll http://timestamp.globalsign.com/scripts/timestamp.dll http://tsa.starfieldtech.com)
REM sign the file...
%1\signt...
Run cron job only if it isn't already running
So I'm trying to set up a cron job as a sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do wha...
What's the point of map in Haskell, when there is fmap?
...point, I prefer the status quo. To me, it seems valuable that there's a subset of Haskell that corresponds roughly to Miranda. In the UK, Miranda was used as a teaching language for maths students not just computer science students. If that niche isn't already lost to a non-functional language (e.g....
Confusion between factor levels and factor labels
...ut in the factor() function. A factor has only a level attribute, which is set by the labels argument in the factor() function. This is different from the concept of labels in statistical packages like SPSS, and can be confusing in the beginning.
What you do in this line of code
df$f <- factor...
How to stop/terminate a python script from running?
I wrote a program in IDLE to tokenize text files and it starts to tokeniza 349 text files! How can I stop it? How can I stop a running Python program?
...
How do I turn on SQL debug logging for ActiveRecord in RSpec tests?
...
You could try setting the ActiveRecord logger to stdout in your test somewhere. If you're using rspec, maybe in the spec helper?
ActiveRecord::Base.logger = Logger.new(STDOUT)
...