大约有 2,700 项符合查询结果(耗时:0.0257秒) [XML]
How to install the Raspberry Pi cross compiler on my Linux host machine?
...
arm-linux-gnueabihf-raspbian-linux/install/arm-linux-gnueabihf/libc --enable-languages=c,c++,fo
rtran --disable-multilib --with-arch=armv6 --with-tune=arm1176jz-s --with-fpu=vfp --with-float=
hard --with-pkgversion='crosstool-NG linaro-1.13.1+bzr2458 - Linaro GCC 2012.08' --with-bugurl=
https:/...
How do I round a decimal value to 2 decimal places (for output on a page)
...ou just need this for display use string.Format
String.Format("{0:0.00}", 123.4567m); // "123.46"
http://www.csharp-examples.net/string-format-double/
The "m" is a decimal suffix. About the decimal suffix:
http://msdn.microsoft.com/en-us/library/364x0z75.aspx
...
How to convert String to long in Java?
...g -> Long, Long.valueOf(primitiveLong). So Long number = Long.valueOf("123"), Long number = Long.parseLong("123") and Long number = Long.valueOf(Long.parseString("123") all end up doing pretty much the same thing. What you do want to be careful about is not calling constructors of the boxed pri...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...法登陆了。尝试几次,发现最大只能设置到100万。在查过源码后,才知道,原来在2.6.25内核之前有个宏定义,定义了这个值的最大值,为1024*1024,正好是100万,而在2.6.25内核及其之后,这个值是可以通过/proc/sys/fs/nr_open来设置。...
(Built-in) way in JavaScript to check if a string is a valid number
...rns true if the variable does NOT contain a valid number
Examples
isNaN(123) // false
isNaN('123') // false
isNaN('1e10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') // true
Of course, you can negate this if you need...
What are copy elision and return value optimization?
...
when the two objects would have been destroyed without the optimization.123 This elision of copy/move
operations, called copy elision, is permitted in the following circumstances (which may be combined to
eliminate multiple copies):
— in a return statement in a function with a class re...
Add a prefix to all Flask routes
..._ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The URL for this page is /abc/123/"
Setting the APPLICATION_ROOT config value simply limit Flask's session...
How do I immediately execute an anonymous function in PHP?
...
@yes123 nope. still have to use call_user_func
– Gordon
Oct 30 '12 at 22:41
2
...
浅析为什么char类型的范围是 -128~+127 - C/C++ - 清泛网 - 专注C/C++及内核技术
...负数的反码是原码除了符号位,其余为都取反,因此-1 的源码为 1 0000001 ,反码为 1 1111110, 现在再用反码来计算 1+(-1)
0000 0001
+ 1111 1110
————————
1111 1111 …………再转化为原码就是 1000 0000 = -0 ,虽然...
Func vs. Action vs. Predicate [duplicate]
...lt;int> myAction = new Action<int>(DoSomething);
myAction(123); // Prints out "123"
// can be also called as myAction.Invoke(123);
Func<int, double> myFunc = new Func<int, double>(CalculateSomething);
Console.Wr...