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How can you encode a string to Base64 in JavaScript?
...ation for Unicode strings: developer.mozilla.org/En/DOM/Window.btoa#Unicode_Strings btoa and atob only work properly for ASCII based strings. As an American, you probably won't notice a difference ... but the first time you use an accented character, your code will break.
– Da...
Remove secure warnings (_CRT_SECURE_NO_WARNINGS) from projects by default in Visual Studio
...nd that you can do it by adding a line in the project option or a #define _CRT_SECURE_NO_WARNINGS in the beginning of the code.
...
How to check if the string is empty?
... the fact that empty sequences are false.
So you should use:
if not some_string:
or:
if some_string:
Just to clarify, sequences are evaluated to False or True in a Boolean context if they are empty or not. They are not equal to False or True.
...
Pragma in define macro
...
If you're using c99 or c++0x there is the pragma operator, used as
_Pragma("argument")
which is equivalent to
#pragma argument
except it can be used in macros (see section 6.10.9 of the c99 standard, or 16.9 of the c++0x final committee draft)
For example,
#define STRINGIFY(a) #a
#def...
手机当上位机：用二进制协议和设备收发数据 · App Inventor 2 中文网
...
电脑装好 Python 3（不需要装任何库），下载 binary_device.py，运行 python binary_device.py。
窗口显示「模拟设备已启动，端口 8888」和电脑 IP。电脑和手机连同一个 Wi-Fi；IP 不对时在电脑上用 ipconfig（Windows）或 ifconfig 查局域网...
What's the difference between a file descriptor and file pointer?
...ture returned by fopen
typedef struct
{
unsigned char *_ptr;
int _cnt;
unsigned char *_base;
unsigned char *_bufendp;
short _flag;
short _file;
int __stdioid;
char *__newbase;
#ifdef _THREAD_SAFE
v...
Can I use multiple versions of jQuery on the same page?
...1.3.js"></script>
<script type="text/javascript">
var jQuery_1_1_3 = $.noConflict(true);
</script>
<!-- load jQuery 1.3.2 -->
<script type="text/javascript" src="http://example.com/jquery-1.3.2.js"></script>
<script type="text/javascript">
var jQuery_1_3...
Combining C++ and C - how does #ifdef __cplusplus work?
...tive.
Now, specifically regarding your numbered questions:
Regarding #1: __cplusplus will stay defined inside of extern "C" blocks. This doesn't matter, though, since the blocks should nest neatly.
Regarding #2: __cplusplus will be defined for any compilation unit that is being run through the C...
What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
...
How to add target=“_blank” to JavaScript window.location?
The following sets the target to _blank :
4 Answers
4
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