大约有 44,000 项符合查询结果（耗时：0.0670秒） [XML]
delete map[key] in go?
...ems a poor use of resources though!
Another way is to check for existence and use the value itself:
package main
func main () {
var sessions = map[string] chan int{};
sessions["moo"] = make (chan int);
_, ok := sessions["moo"];
if ok {
delete(sessions, "moo");
}
}
...
Why can't overriding methods throw exceptions broader than the overridden method?
I was going through SCJP 6 book by Kathe sierra and came across this explanations of throwing exceptions in overridden method. I quite didn't get it. Can any one explain it to me ?
...
How does lombok work?
...re one of those two. For example, the Apple VM ships with stock sun javac, and as such lombok works just fine on macs. Same goes for the soylatte VM, for example.
While for javac we really do have to stick with their updates, partly because of a lot of ongoing work on their compiler right now, we'v...
Hex representation of a color with alpha channel?
Is there a W3 or any other noteworthy standard on how to represent a color (including alpha channel) in hex format?
5 Answe...
Most efficient way to concatenate strings in JavaScript?
In JavaScript, I have a loop that has many iterations, and in each iteration, I am creating a huge string with many += operators. Is there a more efficient way to create a string? I was thinking about creating a dynamic array where I keep adding strings to it and then do a join. Can anyone explain...
how to get the current working directory's absolute path from irb
... possible from irb? Apparently from a script it's possible using File.expand_path(__FILE__)
6 Answers
...
Does constexpr imply inline?
...
Yes ([dcl.constexpr], §7.1.5/2 in the C++11 standard): "constexpr functions and constexpr constructors are implicitly inline (7.1.2)."
Note, however, that the inline specifier really has very little (if any) effect upon whether a compiler is likely to expand a function...
AngularJS best practices for module declaration?
...
'Best' way to declare a module
As angular is on the global scope itself and modules are saved to its variable you can access modules via angular.module('mymod'):
// one file
// NOTE: the immediately invoked function expression
// is used to exemplify different files and is not required
(functio...
如何高效的学习掌握新技术 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...也开阔了很多。
回想编程生涯这些年，2001年开始学习Asp，2002年学习Javascript，2003年学习Asp.Net/C#，2009年学习Objective-C，2013年又跳到前端这个大坑，从Nodejs到 jQuery到 Angularjs到现在的 React。这一路学来，走过一些弯路，也积累了...
When is a function too long? [closed]
...t? I'm asking because I have a function with 60 lines (including comments) and was thinking about breaking it apart.
24 Ans...