大约有 40,000 项符合查询结果（耗时：0.0321秒） [XML]
How do you remove duplicates from a list whilst preserving order?
...ve some alternatives: http://www.peterbe.com/plog/uniqifiers-benchmark
Fastest one:
def f7(seq):
seen = set()
seen_add = seen.add
return [x for x in seq if not (x in seen or seen_add(x))]
Why assign seen.add to seen_add instead of just calling seen.add? Python is a dynamic language, ...
Call by name vs call by value in Scala, clarification needed
...
Here is an example from Martin Odersky:
def test (x:Int, y: Int)= x*x
We want to examine the evaluation strategy and determine which one is faster (less steps) in these conditions:
test (2,3)
call by value: test(2,3) -> 2*2 -> 4
call by name: test(2,3) ->...
How do I get the current time only in JavaScript
...new Date().toLocaleTimeString(); // 11:18:48 AM
//---
new Date().toLocaleDateString(); // 11/16/2015
//---
new Date().toLocaleString(); // 11/16/2015, 11:18:48 PM
4 hours later (use milisec: sec==1000):
new Date(new Date().getTime() + 4*60*60*1000).toLocaleTimeString(); // 3:18:48 PM or 15:18:48
...
Comparing numbers in Bash
...hen
...
fi
You can get a full list of comparison operators with help test or man test.
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How to cast int to enum in C++?
...
int i = 1;
Test val = static_cast<Test>(i);
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Cannot make a static reference to the non-static method
...ss data)
Let me try and explain. Consider this class (psuedocode):
class Test {
string somedata = "99";
string getText() { return somedata; }
static string TTT = "0";
}
Now I have the following use case:
Test item1 = new Test();
item1.somedata = "200";
Test item2 = new Test()...
Using jQuery to test if an input has focus
...)
jQuery 1.5 and below
Edit: As times change, we find better methods for testing focus, the new favorite is this gist from Ben Alman:
jQuery.expr[':'].focus = function( elem ) {
return elem === document.activeElement && ( elem.type || elem.href );
};
Quoted from Mathias Bynens here:
...
byte[] to hex string [duplicate]
... of each of the methods listed here for the hell of it. I based the speed testing code off this.
The result is that BitConverter+String.Replace seems to be faster than most other simple ways. But the speed can be improved with algorithms like Nathan Moinvaziri's ByteArrayToHexString or Kurt's ToH...
How can I delete a query string parameter in JavaScript?
..."?" when there are no parameters after the removal, add an if condition to test if pars.length==0, and if it is 0, then make "url = urlparts[0]" instead of appending the "?".
– johnmcaliley
Nov 14 '10 at 18:42
...
Polymorphism with gson
...rn context.deserialize(jsonObject.get(INSTANCE), klass);
}
}
And the Test class:
public class Test {
public static void main(String[] args) {
IAnimal animals[] = new IAnimal[]{new Cat("Kitty"), new Dog("Brutus", 5)};
Gson gsonExt = null;
{
GsonBuilder ...