大约有 45,000 项符合查询结果（耗时：0.0908秒） [XML]
How do exceptions work (behind the scenes) in c++
...ptions work behind the scenes, so I can make decisions of when to use them and whether they are slow.
7 Answers
...
Whether a variable is undefined [duplicate]
...
jQuery.val() and .text() will never return 'undefined' for an empty selection. It always returns an empty string (i.e. ""). .html() will return null if the element doesn't exist though.You need to do:
if(page_name != '')
For other va...
Running Python code in Vim
I am writing Python code using Vim, and every time I want to run my code, I type this inside Vim:
20 Answers
...
PUT vs. POST in REST
...
Overall:
Both PUT and POST can be used for creating.
You have to ask "what are you performing the action to?" to distinguish what you should be using. Let's assume you're designing an API for asking questions. If you want to use POST then y...
Catch Ctrl-C in C
...
With a signal handler.
Here is a simple example flipping a bool used in main():
#include <signal.h>
static volatile int keepRunning = 1;
void intHandler(int dummy) {
keepRunning = 0;
}
// ...
int main(void) {
signal(SIG...
How to move screen without moving cursor in Vim?
I recently discovered Ctrl + E and Ctrl + Y shortcuts for Vim that respectively move the screen up and down with a one line step, without moving the cursor .
...
Linux find file names with given string
I'm on Ubuntu, and I'd like to find all files in the current directory and subdirectories whose name contains the string "John". I know that grep can match the content in the files, but I have no idea how to use it with file names. Any help would be appreciated.
...
How can I export the schema of a database in PostgreSQL?
...access to a Windows machine but I'm pretty sure from memory that's the command. See if the help works for you too.
share
|
improve this answer
|
follow
|
...
Calling a base class's classmethod in Python
...
Also available as __func__ in python 2.7 and 3
– dtheodor
Apr 29 '14 at 20:09
add a comment
|
...
Understanding Canvas and Surface concepts
I'm struggling to understand the process of drawing to SurfaceView and therefore the whole Surface / Canvas / Bitmap system, which is used in Android.
...