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How to dynamically compose an OR query filter in Django?
...jects.all(). Easy to mitigate by returning Article.objects.none() for that test though.
– Wil
Oct 1 '18 at 14:33
2
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Select first row in each GROUP BY group?
...Example.
If total can be NULL, you most probably want the row with the greatest non-null value. Add NULLS LAST like demonstrated. See:
Sort by column ASC, but NULL values first?
The SELECT list is not constrained by expressions in DISTINCT ON or ORDER BY in any way. (Not needed in the simple case ...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
... 7: R_X86_64_PC32 time-0x4
b: 48 85 c0 test %rax,%rax
e: 75 14 jne 24 <main+0x24>
10: ba 01 00 00 00 mov $0x1,%edx
15: be 00 00 00 00 mov $0x0,%esi
16: R_X86_64_32 .r...
Behaviour of increment and decrement operators in Python
... change local variable, otherwise it will try to change global.
x = 1
def test():
x = 10
y = PreIncrement('x') #y will be 2, local x will be still 10 and global x will be changed to 2
z = PreIncrement('x', locals()) #z will be 11, local x will be 11 and global x will be unaltered
test()...
各编程语言读写文件汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
// 写文件
using (StreamWriter sw = new StreamWriter(@"test.txt"))
{
sw.WriteLine("file content...");
sw.Flush();
sw.Close();
}
// 读文件
using (TextReader reader = new StreamReader("test.txt"))
{
while (reader.P...
UIRefreshControl without UITableViewController
...table view like so: [_tableView insertSubview:_refreshControl atIndex:0];. Tested with both iOS 7 and 8 ;)
– ptitvinou
Oct 24 '14 at 21:32
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Disable browser's back button
...e adverts that are currently flooding the internet, they already abuse the alert system to make leaving their pages difficult without giving them the ability to actually lock you on to their page
– MikeT
Jan 4 '17 at 17:02
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Callback of .animate() gets called twice jquery
...".myClass").animate({
marginLeft: "30em"
}).promise().done(function(){
alert("Done animating");
});
See the jQuery API for detailed description of the Promise and Deferred Objects.
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How to check if an object is a generator object in python?
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Note: if you only need this test, you can avoid a small overhead by using @utdemir solution because inspect.isgenerator is only a shorthand to: isinstance(object, types.GeneratorType).
– bufh
Apr 5 '16 at 7:21
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How to check if a value exists in a dictionary (python)
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i have no python at hand, could you rerun the tests with 'four' instead of 'one' ?
– soulcheck
Nov 21 '11 at 16:55
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