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Arduino 101 实验11 - RGB LCD 显示屏，把手机的字显示到硬件上 · App Inventor 2 中文网
...这也是为什么四个 I2C 口是等价的。
固件：.ino 里把 RGB_LCD 设为 ENABLED，其余 DISABLED。
必须先装好 Grove_LCD_RGB_Backlight 库（见 实验00 第四节，
这个库不在库管理器里，要用 zip 手动装）。
三、界面组件
...
How should I pass multiple parameters to an ASP.Net Web API GET?
...Object> Get(int pageNumber, int pageSize) { ..
add:
config.Routes.MapHttpRoute(
name: "GetPagedData",
routeTemplate: "api/{controller}/{pageNumber}/{pageSize}"
);
Then add the parameters to the HTTP call:
GET //<service address>/Api/Data/2/10
...
performSelector may cause a leak because its selector is unknown
... should simply be ignored, and it's easy to work around. Here's how:
if (!_controller) { return; }
SEL selector = NSSelectorFromString(@"someMethod");
IMP imp = [_controller methodForSelector:selector];
void (*func)(id, SEL) = (void *)imp;
func(_controller, selector);
Or more tersely (though hard...
Can I obtain method parameter name using Java reflection?
...en uses reflection to extract this information from the class at runtime.
https://github.com/paul-hammant/paranamer
I had problems using this library, but I did get it working in the end. I'm hoping to report the problems to the maintainer.
...
Python strptime() and timezones?
...me string is similar to the time format in rfc 2822 (date format in email, http headers). You could parse it using only stdlib:
>>> from email.utils import parsedate_tz
>>> parsedate_tz('Tue Jun 22 07:46:22 EST 2010')
(2010, 6, 22, 7, 46, 22, 0, 1, -1, -18000)
See solutions that...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...ng the ZIP implementation would like to access the data directly):
struct __attribute__((__packed__)) LocalFileHeader {
uint32_t signature;
uint16_t minVersion, flag, method, modTime, modDate;
uint32_t crc32, compressedSize, uncompressedSize;
uint16_t nameLength, extraLength;
};
T...
Convert Base64 string to an image file? [duplicate]
... data in the function before decoding the string, like so.
function base64_to_jpeg($base64_string, $output_file) {
// open the output file for writing
$ifp = fopen( $output_file, 'wb' );
// split the string on commas
// $data[ 0 ] == "data:image/png;base64"
// $data[ 1 ] == &l...
C++对象布局及多态探索之菱形结构虚继承 - C/C++ - 清泛网 - 专注C/C++及内核技术
...0则从C100和C101多重继承而来。
struct C041
{
C041() : c_(0x01) {}
virtual void foo() { c_ = 0x02; }
char c_;
};
struct C100 : public virtual C041
{
C100() : c_(0x02) {}
char c_;
};
struct C101 : public virtual C041
{
C101() : c_(0x03) {}
...
Android SDK manager won't open
...
OK I figured it out. In my case it means going to Computer -> Advanced system settings -> Environment variables -> PATH -> edit: make sure they are in this order: C:\Program Files\Java\jdk1.7.0_11\bin;%SystemRoot%\system32;....
– Hải Phong...
Getting number of elements in an iterator in Python
...d work:
>>> iter = (i for i in range(50))
>>> sum(1 for _ in iter)
50
Although it does iterate through each item and count them, it is the fastest way to do so.
It also works for when the iterator has no item:
>>> sum(1 for _ in range(0))
0
Of course, it runs foreve...