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Pandas - How to flatten a hierarchical index in columns
...s.values]].
– irene
Jul 17 '19 at 8:32
|
show 3 more comme...
Converting between datetime, Timestamp and datetime64
...amp(ts)
datetime.datetime(2012, 12, 4, 19, 51, 25, 362455)
>>> np.__version__
'1.8.0.dev-7b75899'
The above example assumes that a naive datetime object is interpreted by np.datetime64 as time in UTC.
To convert datetime to np.datetime64 and back (numpy-1.6):
>>> np.datetime6...
Inline instantiation of a constant List
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
Simple example of threading in C++
...case?
– user2452253
Nov 4 '14 at 16:32
3
...
How is Math.Pow() implemented in .NET Framework?
...rsion from Henry Warren's Hacker's Delight:
public static int iexp(int a, uint b) {
int y = 1;
while(true) {
if ((b & 1) != 0) y = a*y;
b = b >> 1;
if (b == 0) return y;
a *= a;
}
}
He notes that this operation is optimal (does the minimu...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
...
It seems that for a 64 bit architecture you have to install both the 32-bit version and the 64-bit version of jre (architecture independent files as rt.jar are distributed only in the 32-bit version).
Remember then to pay attention to include the correct java executable on the global PATH env...
How do I output coloured text to a Linux terminal?
...kground
black 30 40
red 31 41
green 32 42
yellow 33 43
blue 34 44
magenta 35 45
cyan 36 46
white 37 47
Additionally, you can use these:
reset 0 (everything back to n...
Does Java have something like C#'s ref and out keywords?
...mulate reference with wrappers.
And do the following:
void changeString( _<String> str ) {
str.s("def");
}
void testRef() {
_<String> abc = new _<String>("abc");
changeString( abc );
out.println( abc ); // prints def
}
Out
void setString( _<String> re...
How do I read the contents of a Node.js stream into a string variable?
...INVALID_ARG_TYPE]: The "list[0]" argument must be an instance of Buffer or Uint8Array. Received type string if the stream produces string chunks instead of Buffer. Using chunks.push(Buffer.from(chunk)) should work with both string and Buffer chunks.
– Andrei LED
...
Understanding slice notation
...asic sequences don't support them.
>>> class slicee:
... def __getitem__(self, item):
... return repr(item)
...
>>> slicee()[0, 1:2, ::5, ...]
'(0, slice(1, 2, None), slice(None, None, 5), Ellipsis)'
...