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What is the difference between Python's list methods append and extend?
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5329
append: Appends object at the end.
x = [1, 2, 3]
x.append([4, 5])
print (x)
gives you: [1, ...
What is the difference between a static and a non-static initialization code block
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– Rafael Winterhalter
Jun 17 '14 at 15:32
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How to make a chain of function decorators?
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32
*argsand **kwargs should be added in the answer. Decorated function can have arguments, and they will be lost if not specified.
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Are there any SHA-256 javascript implementations that are generally considered trustworthy?
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// convert ArrayBuffer to Array
const hashArray = Array.from(new Uint8Array(hashBuffer));
// convert bytes to hex string
const hashHex = hashArray.map(b => ('00' + b.toString(16)).slice(-2)).join('');
return hashHex;
}
Note that crypto.subtle in only ava...
LINQ: Distinct values
...ityComparer<T>
{
private readonly Func<T, T, bool> _expression;
public LambdaComparer(Func<T, T, bool> lambda)
{
_expression = lambda;
}
public bool Equals(T x, T y)
{
return _expression(x, y);
}
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Is it better in C++ to pass by value or pass by constant reference?
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edited Dec 9 '14 at 21:32
ahcox
7,44655 gold badges2828 silver badges3636 bronze badges
answered Nov ...
Unique Key constraints for multiple columns in Entity Framework
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With Entity Framework 6.1, you can now do this:
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }
The second parameter in the attribute is where you can spec...
In Python, how do I read the exif data for an image?
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You can use the _getexif() protected method of a PIL Image.
import PIL.Image
img = PIL.Image.open('img.jpg')
exif_data = img._getexif()
This should give you a dictionary indexed by EXIF numeric tags. If you want the dictionary indexed by t...
iPhone: How to get current milliseconds?
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Stan James
2,1772323 silver badges3434 bronze badges
answered Apr 30 '10 at 5:03
Allan SimonsenAllan Simonsen
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Convert datetime object to a String of date only in Python
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If you want the time as well, just go with
datetime.datetime.now().__str__()
Prints 2019-07-11 19:36:31.118766 in console for me
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