大约有 47,000 项符合查询结果（耗时：0.0523秒） [XML]
Converting between datetime, Timestamp and datetime64
... np
>>> dt = datetime.utcnow()
>>> dt
datetime.datetime(2012, 12, 4, 19, 51, 25, 362455)
>>> dt64 = np.datetime64(dt)
>>> ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
>>> ts
1354650685.3624549
>>> datetime.utcfromt...
Splitting string into multiple rows in Oracle
...oach to splitting a string (comma delimited) into multiple rows in Oracle 10g (preferably) and 11g.
13 Answers
...
How to iterate object in JavaScript? [duplicate]
... Neuron
3,54333 gold badges2323 silver badges4040 bronze badges
answered Mar 19 '13 at 10:14
kavinkavin
1,70411 gold badge10...
In Python, what is the difference between “.append()” and “+= []”?
...ase the only difference is performance: append is twice as fast.
Python 3.0 (r30:67507, Dec 3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import timeit
>>> timeit.Timer('s.append("something")', 's...
Time complexity of Sieve of Eratosthenes algorithm
...
answered Apr 6 '10 at 5:17
ShreevatsaRShreevatsaR
34.9k1515 gold badges9595 silver badges117117 bronze badges
...
How do you simulate Mouse Click in C#?
...ons
{
[Flags]
public enum MouseEventFlags
{
LeftDown = 0x00000002,
LeftUp = 0x00000004,
MiddleDown = 0x00000020,
MiddleUp = 0x00000040,
Move = 0x00000001,
Absolute = 0x00008000,
RightDown = 0x00000008,
RightUp = 0x00000010
...
Geometric Mean: is there a built-in?
...ositive values.
gm_mean = function(x, na.rm=TRUE){
exp(sum(log(x[x > 0]), na.rm=na.rm) / length(x))
}
Thanks to @ben-bolker for noting the na.rm pass-through and @Gregor for making sure it works correctly.
I think some of the comments are related to a false-equivalency of NA values in the d...
Add st, nd, rd and th (ordinal) suffix to a number
... '14) accomplishes this:
function ordinal_suffix_of(i) {
var j = i % 10,
k = i % 100;
if (j == 1 && k != 11) {
return i + "st";
}
if (j == 2 && k != 12) {
return i + "nd";
}
if (j == 3 && k != 13) {
return i + "rd";
...
sed error: “invalid reference \1 on `s' command's RHS”
...capture for that to work? i.e. for variant 2:
-r -e "s/WARNING: (\([a-zA-Z0-9./\\ :-]\+\))/${warn}WARNING: \1${c_end}/g" \
(Note: untested)
Without the -r argument back-references (like \1) won't work.
share
|
...
How can I round down a number in Javascript?
...
|
edited Sep 30 '19 at 10:01
Gerrit Bertier
3,1071515 silver badges2727 bronze badges
answer...