大约有 17,000 项符合查询结果（耗时：0.0426秒） [XML]
Why does base64 encoding require padding if the input length is not divisible by 3?
...ally it seems you can't, for example the implementations in javascript and php don't support this. Starting with a concatenated string, you either have to decode 4 bytes at a time or split the string after padding characters. It seems like those implementations just ignore the padding chars, even wh...
“ImportError: No module named” when trying to run Python script
...d the folder in which you told the notebook to operate from in your ipython_notebook_config.py file (typically using the c.NotebookManager.notebook_dir setting).
The solution is to provide the python interpreter with the path-to-your-module. The simplest solution is to append that path to your sys....
Explicitly calling return in a function or not
...t return. The following plot is created from data selected this way:
bench_nor2 <- function(x,repeats) { system.time(rep(
# without explicit return
(function(x) vector(length=x,mode="numeric"))(x)
,repeats)) }
bench_ret2 <- function(x,repeats) { system.time(rep(
# with explicit return
(funct...
What is the effect of extern “C” in C++?
...n it posted yet.
You'll very often see code in C headers like so:
#ifdef __cplusplus
extern "C" {
#endif
// all of your legacy C code here
#ifdef __cplusplus
}
#endif
What this accomplishes is that it allows you to use that C header file with your C++ code, because the macro "__cplusplus" will...
mongo group query how to keep fields
...h group, you can try aggregating like:
db.test.aggregate({
$group: {
_id : '$name',
name : { $first: '$name' },
age : { $first: '$age' },
sex : { $first: '$sex' },
province : { $first: '$province' },
city : { $first: '$city' },
area : { $first: '$area' },
address : { $firs...
What Process is using all of my disk IO
...[jdb2/nvme0n1p1] in iotop, but I got lucky with enabling /proc/sys/vm/block_dump and comparing the output to a healthy/stable system lxadm.com/Simple_filesystem_read/write_tracing_with_/proc/sys/… It helped find a docker container that was continuously spawning kubectl requests, exhausting an EBS ...
Decorators with parameters?
I have a problem with the transfer of variable 'insurance_mode' by the decorator. I would do it by the following decorator statement:
...
How to specify different Debug/Release output directories in QMake .pro file
...cpp \
src/dialogs.cpp
Release:DESTDIR = release
Release:OBJECTS_DIR = release/.obj
Release:MOC_DIR = release/.moc
Release:RCC_DIR = release/.rcc
Release:UI_DIR = release/.ui
Debug:DESTDIR = debug
Debug:OBJECTS_DIR = debug/.obj
Debug:MOC_DIR = debug/.moc
Debug:RCC_DIR = debug/.rcc
Debug:...
No output to console from a WPF application?
...ity]
public static class ConsoleManager
{
private const string Kernel32_DllName = "kernel32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kernel32_DllName)]
...
Can I use Twitter Bootstrap and jQuery UI at the same time?
...no]
- jquery-ui-1.9.2.custom.min.css
[images]
- ui-bg_diagonals-thick_90_eeeeee_40x40.png
- ui-bg_glass_100_e4f1fb_1x400.png
- ui-bg_glass_50_3baae3_1x400.png
- ui-bg_glass_80_d7ebf9_1x400.png
- ui-bg_highlight-hard_100_f2f5f7_1x100.png
...