大约有 47,000 项符合查询结果（耗时：0.0777秒） [XML]
还原MongoDB中Decimal类型数据 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数据（原数据为0.12345）可能是类似0.1234499999999的形式，ToString("f4")转化string值为0.1234，正确值应为0.1235。
解决方法：
先还原Double类型后值为0.12345，再做四舍五入。
private static string Decimal2String(decimal dec)
{
return dec == 0 ?...
Swift equivalent of [NSBundle bundleForClass:[self class]]
...he solution doesn't work for value types. Consider using init?(identifier: String) where identifier is your target's bundle ID. Another solution for value types is to declare an empty class inside your value type. Example of the latter solution: Bundle(for: Foo.Bar.self) where Foo - your struct, Bar...
Open files in 'rt' and 'wt' modes
...d binary file modes (on all platforms). In text mode, read returns Unicode strings. In binary mode, read returns a bytes instance. If you want to write Python 2 code with forwards compatibility in mind, you can use io.open rather than the standard open to get the Python 3 behavior (with unicode vers...
Meaning of Git checkout double dashes
...k-dot-see.
Git 2.5 looses the heuristic to declare that with a wildcard string the user likely meant to give us a pathspec.
git checkout 'a*'
# same as
git checkout -- 'a*'
See commit 28fcc0b (02 May 2015) by Duy Nguyen (nguyenlocduy).
(Merged by Junio C Hamano -- gitster -- in commit 949d167,...
C++ template constructor
...ss V>
A( types<T,U,V> );
};
auto a = A(types<int,double,std::string>{});
share
|
improve this answer
|
follow
|
...
Xcode 4 - “Archive” is greyed out?
...sable the Archive button. Run through the checks that would cause an error and then display an alert. I bet 9/10 it's the simulator. "You may not archive a build for the simulator. Select iOS Device and Archive again."
– Harry Love
Mar 30 '13 at 4:35
...
How to construct a set out of list items in python?
...
If you have a list of hashable objects (filenames would probably be strings, so they should count):
lst = ['foo.py', 'bar.py', 'baz.py', 'qux.py', Ellipsis]
you can construct the set directly:
s = set(lst)
In fact, set will work this way with any iterable object! (Isn't duck typing gre...
Python: List vs Dict for look up table
...st and use binary search. This is O(log n), and is likely to be slower for strings, impossible for objects which do not have a natural ordering.
share
|
improve this answer
|
...
Exec : display stdout “live”
...
ls.stdout.on('data', function (data) {
console.log('stdout: ' + data.toString());
});
ls.stderr.on('data', function (data) {
console.log('stderr: ' + data.toString());
});
ls.on('exit', function (code) {
console.log('child process exited with code ' + code.toString());
});
exec buffers t...
How do I add a simple onClick event handler to a canvas element?
...hello world!')"; // does nothing, even with clicking
You are assigning a string to the onClick property of elem.
elem.onClick = function() { alert('hello world!'); }; // does nothing
JavaScript is case sensitive. The onclick property is the archaic method of attaching event handlers. It only al...