大约有 32,000 项符合查询结果（耗时：0.0476秒） [XML]
Get Character value from KeyCode in JavaScript… then trim
...aracters, if it's not a control character I check against a range and only then do I need to get the actual character. Given I'm not worried about case (I change all letters to uppercase anyway) and have already limited the range of keycodes, I only have to worry about the numberpad keys. The foll...
Checking for a dirty index or untracked files with Git
...) use this:
git diff-index --quiet --cached HEAD --
If it exits with 0 then there were no differences (1 means there were differences).
To check whether a working tree has changes that could be staged:
git diff-files --quiet
The exit code is the same as for git diff-index (0 == no differen...
Concatenating null strings in Java [duplicate]
...h no arguments; but if the result of invoking the toString method is null, then the string "null" is used instead.
How does it work?
Let's look at the bytecode! The compiler takes your code:
String s = null;
s = s + "hello";
System.out.println(s); // prints "nullhello"
and compiles it into b...
Generate an integer that is not among four billion given ones
...at takes more than 10 MB to represent exactly, but if the input is a file, then you can at least represent the length of anything that fits in it).
share
|
improve this answer
|
...
PostgreSQL create table if not exists
...HERE schemaname = 'myschema'
AND tablename = 'mytable') THEN
RAISE NOTICE 'Table myschema.mytable already exists.';
ELSE
CREATE TABLE myschema.mytable (i integer);
END IF;
END
$func$;
Call:
SELECT create_mytable(); -- call as many times as you want.
Not...
How to manually create icns files using iconutil?
...it to a filed called "CreateICNS.src" in the folder where your png file is then in terminal "cd" to the same folder and type "source CreateICNS.src" to call it:
mkdir MyIcon.iconset
sips -z 16 16 Icon1024.png --out MyIcon.iconset/icon_16x16.png
sips -z 32 32 Icon1024.png --out MyIcon.iconse...
How can I unit test Arduino code?
...-critical routines ran perfectly until you uploaded to the actual Arduino, then the only lesson you're going to learn is that the emulator is flawed--and knowing this still reveals nothing about the quality of your own work.
If it's silly to test on the device or emulator, what should I do?
You're...
Error: Cannot access file bin/Debug/… because it is being used by another process
...ching here.
What's happening is that VS is acquiring a lock on a file and then not releasing it. Ironically, that lock prevents VS itself from deleting the file so that it can recreate it when you rebuild the application. The only apparent solution is to close and restart VS so that it will release...
What does @media screen and (max-width: 1024px) mean in CSS?
... the page render on the screen at a resolution of max 1024 pixels in width then apply the rule that follow.
As you may already know in fact you can target some CSS to a media type that can be one of handheld, screen, printer and so on.
Have a look here for details..
...
Simpler way to put PDB breakpoints in Python code?
... running
python -m pdb your_script.py
It will break on the 1st line, then you'll be able to add a breakpoint wherever you want in your code using the break command, its syntax is:
b(reak) [[filename:]lineno | function[, condition]]
It is flexible enough to give you the ability to add a b...