大约有 46,000 项符合查询结果（耗时：0.0732秒） [XML]
How is pattern matching in Scala implemented at the bytecode level?
...
case Sum(l,r) // instance of check followed by fetching the two arguments and assigning to two variables l and r but see below about custom extractors
case "hello" // equality check
case _ : Foo // instance of check
case x => // assignment to a fresh variable
case _ => // do nothing, this is...
CSS force image resize and keep aspect ratio
I am working with images, and I ran across a problem with aspect ratios.
23 Answers
23...
Select multiple columns in data.table by their numeric indices
...
No problem. Compare also dt[,"a"] and dt[,"a", with=FALSE] to see what a helpful option it really is.
– Josh O'Brien
Nov 14 '12 at 17:41
3
...
how to return index of a sorted list? [duplicate]
I need to sort a list and then return a list with the index of the sorted items in the list. For example, if the list I want to sort is [2,3,1,4,5] , I need [2,0,1,3,4] to be returned.
...
JavaScript variables declare outside or inside loop?
...rmance, in JavaScript or ActionScript.
var is a directive for the parser, and not a command executed at run-time. If a particular identifier has been declared var once or more anywhere in a function body(*), then all use of that identifier in the block will be referring to the local variable. It ma...
What's wrong with Groovy multi-line String?
... The first assigns test to a, the second two try to make "test" positive (and this is where it fails)
With the new String constructor method, the Groovy parser is still in the constructor (as the brace hasn't yet closed), so it can logically join the three lines together into a single statement
F...
How to strip leading “./” in unix “find”?
..." files/directories -- those which begins with dot (.) Try to run this command in your home dir, then just "find -type f" and see the difference.
– Ilia K.
Apr 8 '10 at 0:01
35
...
Sequence-zip function for c++11?
...
Warning: boost::zip_iterator and boost::combine as of Boost 1.63.0 (2016 Dec 26) will cause undefined behavior if the length of the input containers are not the same (it may crash or iterate beyond the end).
Starting from Boost 1.56.0 (2014 Aug 7) you...
How to pass parameters to a partial view in ASP.NET MVC?
...
How do you access the object? Model.firstName and their like throw an exception that object doesn't have a 'firstName' property
– ashes999
Apr 20 '13 at 1:22
...
Diff two tabs in Vim
Scenario: I have opened Vim and pasted some text. I open a second tab with :tabe and paste some other text in there.
4 An...