大约有 16,000 项符合查询结果（耗时：0.0336秒） [XML]
drag drop files into standard html file input
...ays we can drag & drop files into a special container and upload them with XHR 2. Many at a time. With live progress bars etc. Very cool stuff. Example here.
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How do I access this object property with an illegal name?
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<?php
$x = new StdClass();
$x->{'todo-list'} = 'fred';
var_dump($x);
So, $object->{'todo-list'} is the sub-object. If you can set it like that, then you can also read it the same way:
echo $x->{'todo-list'};
Another poss...
“Private” (implementation) class in Python
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Use a single underscore prefix:
class _Internal:
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This is the official Python convention for 'internal' symbols; "from module import *" does not import underscore-prefixed objects.
Edit: Reference to the single underscore convention
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Why can't decimal numbers be represented exactly in binary?
...n several questions posted to SO about floating-point representation. For example, the decimal number 0.1 doesn't have an exact binary representation, so it's dangerous to use the == operator to compare it to another floating-point number. I understand the principles behind floating-point representa...
Converting an int to std::string
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@bparker Right, it's been fixed in gcc 4.8.0 I guess. MinGW coming with latest Code::Blocks (13.12) still has gcc 4.7.1.
– Archie
Dec 2 '15 at 16:24
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Return first N key:value pairs from dict
...no longer correct. Python dicts now preserve insertion order, and this is explicitly documented.
– Konrad Rudolph
Sep 22 at 12:30
1
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Generate colors between red and green for a power meter?
...hould work - just linearly scale the red and green values. Assuming your max red/green/blue value is 255, and n is in range 0 .. 100
R = (255 * n) / 100
G = (255 * (100 - n)) / 100
B = 0
(Amended for integer maths, tip of the hat to Ferrucio)
Another way to do would be to use a HSV colour model...
How to get duplicate items from a list using LINQ? [duplicate]
...t actually return all duplicate records, it returns all duplicate records EXCEPT for the first occurrence in each group. So yes, if you're after a list of just the distinct duplicate values then this answer, with the Distinct method is the way to go, but if you want all the duplicate rows, then Scot...
What do Clustered and Non clustered index actually mean?
I have a limited exposure to DB and have only used DB as an application programmer. I want to know about Clustered and Non clustered indexes .
I googled and what I found was :
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returning in the middle of a using block
...ou didn't return and simply kept a reference to a variable.
using ( var x = new Something() ) {
// not a good idea
return x;
}
Just as bad
Something y;
using ( var x = new Something() ) {
y = x;
}
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