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米思齐(Mixly) × App Inventor2 接入调研报告：技术路线、接入步骤与教程...
...发的图形化编程 IDE，基于 Google Blockly，用于 Arduino AVR/ESP32/ESP8266、MicroPython（掌控板、Micro:bit 等）编程。客户说"接入米思齐"，本质需求通常是：用 App Inventor2 做手机 App，通过蓝牙/WiFi 与 Mixly 编程的硬件（Arduino/ESP32/掌...
Which one will execute faster, if (flag==0) or if (0==flag)?
...1;
}
int yoda(int c) {
if (0 == c) { return 0; }
return 1;
}
define i32 @regular(i32 %c) nounwind readnone {
entry:
%not. = icmp ne i32 %c, 0 ; <i1> [#uses=1]
%.0 = zext i1 %not. to i32 ; <i32> [#uses=1]
ret i32 %.0
}
define i32 @yo...
IIS7 Settings File Locations
...e looking for applicationHost.config, which is located in C:\Windows\System32\inetsrv\config.
Yes, it's an XML file, and yes, editing the file by hand will affect the IIS config after a restart. You can think of IIS Manager as a GUI front-end for editing applicationHost.config and web.config.
...
Rank function in MySQL
... person VALUES (3, 'Jack', 30, 'M');
INSERT INTO person VALUES (4, 'Bill', 32, 'M');
INSERT INTO person VALUES (5, 'Nick', 22, 'M');
INSERT INTO person VALUES (6, 'Kathy', 18, 'F');
INSERT INTO person VALUES (7, 'Steve', 36, 'M');
INSERT INTO person VALUES (8, 'Anne', 25, 'F');
Result:
+---------...
How should I print types like off_t and size_t?
...e are macros you can use, like another answer said:
printf("value: %" PRId32, some_int32_t);
printf("value: %" PRIu16, some_uint16_t);
They are listed in the manpage of inttypes.h.
Personally, I would just cast the values to unsigned long or long like another answer recommends. If you use C99, ...
How to extract numbers from a string in Python?
...:
>>> import re
>>> re.findall(r'\d+', 'hello 42 I\'m a 32 string 30')
['42', '32', '30']
This would also match 42 from bla42bla. If you only want numbers delimited by word boundaries (space, period, comma), you can use \b :
>>> re.findall(r'\b\d+\b', 'he33llo 42 I\'m ...
Performance surprise with “as” and nullable types
...he only differenc in IL I can see is that
isinst [mscorlib]System.Int32
gets changed to
isinst valuetype [mscorlib]System.Nullable`1<int32>
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How does a garbage collector avoid an infinite loop here?
...
Nate Cook
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answered Jul 9 '14 at 19:49
ServyServy
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Can I get Memcached running on a Windows (x64) 64bit environment?
...
Just so people know, the 32-bit and 64-bit version as build by the good people from membase/couchbase/whatever is still available the blog URL has changed though:
32-bit binary of memcached 1.4.4 as Windows-service:
http://blog.couchbase.com/memcac...
convert double to int
...e the range of int in an unchecked context, whereas a call to Convert.ToInt32(double) will. The result of the cast (in an unchecked context) is explicitly undefined if the value is outside the range.
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