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Understanding the main method of python [duplicate]
...__name__ line is being executed, evaluated, in both cases. It's evaluated by the interpreter when the file is imported or when it's executed. If you put a print statement before the if __name__ line then it will print output every time any other code attempts to import that as a module. (Of cours...
The maximum value for an int type in Go
...binary: all ones
// Shift the binary number to the right (i.e. divide by two)
// to change the high bit to 0
MaxInt = int(MaxUint >> 1) // binary: all ones except high bit
// Perform another bitwise NOT to change the high bit to 1 and
// all other bits to 0
MinI...
How do I get the number of days between two dates in JavaScript?
...es on the fact that you can get the elapsed milliseconds between two dates by subtracting them, which coerces them into their primitive number value (milliseconds since the start of 1970).
// new Date("dateString") is browser-dependent and discouraged, so we'll write
// a simple parse functio...
What is the difference between onPause() and onStop() of Android Activites?
...ctivities at the same time. The first activity with the fields is obscured by another activity, and the user can no longer interact with it. However, it is still visible with all the resulting consequences.
That leaves a question which activity is considered fully opaque and covering the whole scre...
@OneToMany List vs Set difference
...list, if there is no index column specified, will just be handled as a bag by Hibernate (no specific ordering).
One notable difference in the handling of Hibernate is that you can't fetch two different lists in a single query. For example, if you have a Person entity having a list of contacts and ...
Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... literal和模块，允许现代语言的框架无需深入即可使用。(by gashero)感谢这些基础工作，才使得可以在Apple软件开发中引入新的编程语言。
Objective-C开发者会感到Swift的似曾相识。Swift采用了Objective-C的命名参数和动态对象模型。提...
Different floating point result with optimization enabled - compiler bug?
...les.
In x86_64 builds compilers use SSE registers for float and double by default, so that no extended precision is used and this issue doesn't occur.
gcc compiler option -mfpmath controls that.
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Subtract 7 days from current date
...
use dateByAddingTimeInterval method:
NSDate *now = [NSDate date];
NSDate *sevenDaysAgo = [now dateByAddingTimeInterval:-7*24*60*60];
NSLog(@"7 days ago: %@", sevenDaysAgo);
output:
7 days ago: 2012-04-11 11:35:38 +0000
Hope it ...
What does iota of std::iota stand for?
...(inventor of APL) said this:
For example, the integer function denoted by ι produces a vector of the first n integers when applied to the argument n, …
That ι is the lower-case Greek letter iota.
In the quote above, I typed ι, U+03B9, “GREEK SMALL LETTER IOTA”, but Unicode actually h...
Sample settings.xml for maven
...icense at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific ...