大约有 13,906 项符合查询结果（耗时：0.0204秒） [XML]
Converting from longitude\latitude to Cartesian coordinates
... it all depends on the accuracy you require for what you are doing. For example, the result calculated from "Manhattan Distance Formula" versus the result from the "Distance Formula" can be better for certain situations as it is computationally less expensive. Think "which point is closest?" scen...
Regular Expression to reformat a US phone number in Javascript
...ences for validating) a phone number for display in Javascript. Here's an example of some of the data:
12 Answers
...
Cleaning `Inf` values from an R dataframe
... do.call to recreate a data.frame.
do.call(data.frame,lapply(DT, function(x) replace(x, is.infinite(x),NA)))
Option 2 -- data.table
You could use data.table and set. This avoids some internal copying.
DT <- data.table(dat)
invisible(lapply(names(DT),function(.name) set(DT, which(is.infinite(...
Convert a Scala list to a tuple?
...a tuple must be encoded in its type, and hence known at compile time. For example, (1,'a',true) has the type (Int, Char, Boolean), which is sugar for Tuple3[Int, Char, Boolean]. The reason tuples have this restriction is that they need to be able to handle a non-homogeneous types.
...
Why Choose Struct Over Class?
...fy a single instance of a variable. (For the more technically minded, the exception to that is when capturing a struct inside a closure because then it is actually capturing a reference to the instance unless you explicitly mark it to be copied).
Classes can also become bloated because a class can ...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...$ python
Python 2.7.3 (default, Apr 20 2012, 22:39:59)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> s = '(\xef\xbd\xa1\xef\xbd\xa5\xcf\x89\xef\xbd\xa5\xef\xbd\xa1)\xef\xbe\x89'
>>> s1 = s.decode('utf-8')
>>> print s1
(...
What is aspect-oriented programming?
...n code and define it vertically like so:
function mainProgram()
{
var x = foo();
doSomethingWith(x);
return x;
}
aspect logging
{
before (mainProgram is called):
{
log.Write("entering mainProgram");
}
after (mainProgram is called):
{
log.Write( "ex...
Scala how can I count the number of occurrences in a list
...
what if I wanted to define an accumulator map in that expression instead of creating a new map?
– Tobias Kolb
Jun 12 '19 at 13:33
add a comment
...
Can't pickle when using multiprocessing Pool.map()
...e pickled, registering it with the copy_reg standard library method.
For example, Steven Bethard's contribution to this thread (towards the end of the thread) shows one perfectly workable approach to allow method pickling/unpickling via copy_reg.
...