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Python: How to create a unique file name?
...98-442b-bd2e-9de010132dc4'
>>> uuid.uuid4().hex
'5ad02dfb08a04d889e3aa9545985e304' # <-- this one
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How to bring back “Browser mode” in IE11?
...0,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,69,e3,6f,1a,8c,f2,d9,4a,a3,e6,2b,cb,50,80,7c,f1
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Best way to combine two or more byte arrays in C#
...u need a new byte array, use
byte[] rv = new byte[a1.Length + a2.Length + a3.Length];
System.Buffer.BlockCopy(a1, 0, rv, 0, a1.Length);
System.Buffer.BlockCopy(a2, 0, rv, a1.Length, a2.Length);
System.Buffer.BlockCopy(a3, 0, rv, a1.Length + a2.Length, a3.Length);
But, if you can use an IEnumerabl...
Array vs. Object efficiency in JavaScript
...cts.
These are arrays:
var a1 = [1, 2, 3];
var a2 = ["a", "b", "c"];
var a3 = [];
a3[0] = "a";
a3[1] = "b";
a3[2] = "c";
This is an array, too:
var a3 = [];
a3[29938] = "a";
a3[32994] = "b";
It's basically an array with holes in it, because every array does have continous indexing. It's slowe...
Git, How to reset origin/master to a commit?
...e push your local changes to master:
git checkout master
git reset --hard e3f1e37
git push --force origin master
# Then to prove it (it won't print any diff)
git diff master..origin/master
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How to convert integer timestamp to Python datetime
...0000
>>> date = datetime.datetime.fromtimestamp(your_timestamp / 1e3)
and the result is:
>>> date
datetime.datetime(2012, 3, 16, 1, 0)
Does it answer your question?
EDIT: J.F. Sebastian correctly suggested to use true division by 1e3 (float 1000). The difference is significan...
How do I create an array of strings in C?
...
char a1[][14] = { "blah", "hmm" };
char* a2[] = { "blah", "hmm" };
char (*a3[])[] = { &"blah", &"hmm" }; // only since you brought up the syntax -
printf(a1[0]); // prints blah
printf(a2[0]); // prints blah
printf(*a3[0]); // prints blah
The advantage of a2 is that you can then do the f...
Why is a round-trip conversion via a string not safe for a double?
... *dst = 0;
}
}
It turns out that _ecvt returns the string 845512408225570.
Notice the trailing zero? It turns out that makes all the difference!
When the zero is present, the result actually parses back to 0.84551240822557006, which is your original number -- so it compares equal, and henc...
Convert data.frame column to a vector?
...e drop=FALSE option to [:
R> aframe <- data.frame(a1=c1:5, a2=6:10, a3=11:15)
R> aframe
a1 a2 a3
1 1 6 11
2 2 7 12
3 3 8 13
4 4 9 14
5 5 10 15
R> avector <- aframe[, "a2"]
R> avector
[1] 6 7 8 9 10
R> avector <- aframe[, "a2", drop=FALSE]
R> avector
a2
1 ...
How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ray(std::string("Cat3"), std::string("Dog3")), make_array(std::string("Mouse3"), std::string("Rat3"))),
make_array(make_array(std::string("Cat4"), std::string("Dog4")), make_array(std::string("Mouse4"), std::string("Rat4")))
);
std::cout << q << s...