大约有 40,000 项符合查询结果（耗时：0.1040秒） [XML]
What's the difference between the data structure Tree and Graph?
Academically speaking, what's the essential difference between the data structure Tree and Graph? And how about the tree based search and Graph based search?
...
How to convert 2D float numpy array to 2D int numpy array?
...(int), np.array([-np.inf]).astype(int), and np.array([np.nan]).astype(int) all return the same thing. Why?
– BallpointBen
May 14 '18 at 20:47
1
...
Force R not to use exponential notation (e.g. e+10)?
...
This is a bit of a grey area. You need to recall that R will always invoke a print method, and these print methods listen to some options. Including 'scipen' -- a penalty for scientific display. From help(options):
‘scipen’: integer. A penalty to be applied wh...
What is “lifting” in Scala?
...ethod into a function by applying the underscore
scala> val f = times2 _
f: Int => Int = <function1>
scala> f(4)
res0: Int = 8
Note the fundamental difference between methods and functions. res0 is an instance (i.e. it is a value) of the (function) type (Int => Int)
Functors
...
How to prevent a jQuery Ajax request from caching in Internet Explorer?
...
You can disable caching globally using $.ajaxSetup(), for example:
$.ajaxSetup({ cache: false });
This appends a timestamp to the querystring when making the request. To turn cache off for a particular $.ajax() call, set cache: false on it locally, ...
Prepend a level to a pandas MultiIndex
...
This is especially nice for adding a level to the columns by adding axis=1, since the df.columns doesn't have the "set_index" method like the index, which always bugs me.
– Rutger Kassies
Feb 10 '17 a...
Convert to binary and keep leading zeros in Python
...ction in Python. However, it always removes the leading zeros, which I actually need, such that the result is always 8-bit:
...
TypeScript sorting an array
..., b) {
var ax = [], bx = [];
a.replace(/(\d+)|(\D+)/g, function (_, $1, $2) { ax.push([$1 || Infinity, $2 || ""]) });
b.replace(/(\d+)|(\D+)/g, function (_, $1, $2) { bx.push([$1 || Infinity, $2 || ""]) });
while (ax.length && bx.length) {
var an = ax.shift();
...
Showing the stack trace from a running Python application
... prompt for
interactive debugging."""
d={'_frame':frame} # Allow access to frame object.
d.update(frame.f_globals) # Unless shadowed by global
d.update(frame.f_locals)
i = code.InteractiveConsole(d)
message = "Signal received : entering python shell.\nTraceback:\n"...
Git push rejected after feature branch rebase
...hat remote branch can be fast-forwarded to your local branch, that is that all the difference between local and remote branches is in local having some new commits at the end like that:
Z--X--R <- origin/some-branch (can be fast-forwarded to Y commit)
\
T--Y <...