大约有 12,000 项符合查询结果（耗时：0.0353秒） [XML]
What's the cleanest way of applying map() to a dictionary in Swift?
... problem.
#1. Using Dictionary mapValues(_:) method
let dictionary = ["foo": 1, "bar": 2, "baz": 5]
let newDictionary = dictionary.mapValues { value in
return value + 1
}
//let newDictionary = dictionary.mapValues { $0 + 1 } // also works
print(newDictionary) // prints: ["baz": 6, "foo": 2...
Best way to require all files from a directory in ruby?
... .rb extension is optional. Technically it changes the meaning: "require 'foo.rb'" requires foo.rb, whereas "require 'foo'" might require foo.rb, foo.so or foo.dll.
– Sam Stokes
Apr 9 '09 at 17:46
...
What does jQuery.fn mean?
... structure that resembles the architecture of jQuery:
(function() {
var foo = function(arg) { // core constructor
// ensure to use the `new` operator
if (!(this instanceof foo))
return new foo(arg);
// store an argument for this example
this.myArg = arg;
//..
};
// ...
Git copy file preserving history [duplicate]
...(using git log) for both files.
Suppose you want to create a copy of file foo called bar. In that case the workflow you'd use would look like this:
git mv foo bar
git commit
SAVED=`git rev-parse HEAD`
git reset --hard HEAD^
git mv foo copy
git commit
git merge $SAVED # This will generate con...
How to run test cases in a specified file?
...o name the specific file, containing the tests you want to run:
$ go test foo_test.go
But there's a catch. This works well if:
foo.go is in package foo.
foo_test.go is in package foo_test and imports 'foo'.
If foo_test.go and foo.go are the same package (a common case) then you must name all ...
How different is Objective-C from C++? [closed]
...esn't allow implicit method overloading, but C++ does. That is, in C++ int foo (void) and int foo (int) define an implicit overload of the method foo, but to achieve the same in Objective-C requires the explicit overloads - (int) foo and - (int) foo:(int) intParam. This is due to Objective-C's named...
How to add a new method to a php object on the fly?
...
You can harness __call for this:
class Foo
{
public function __call($method, $args)
{
if (isset($this->$method)) {
$func = $this->$method;
return call_user_func_array($func, $args);
}
}
}
$foo = new Foo();...
How do I write a bash script to restart a process if it dies?
...
Consider this:
PID recycling (killing the wrong process):
/etc/init.d/foo start: start foo, write foo's PID to /var/run/foo.pid
A while later: foo dies somehow.
A while later: any random process that starts (call it bar) takes a random PID, imagine it taking foo's old PID.
You notice foo's gone...
How to convert a clojure keyword into a string?
...
Maybe this answer should explain why (name :foo/123/bar) is "bar". If you want the full path of a keyword you need to use subs or something like (str (namespace k) "/" (name k))
– AnnanFay
Apr 6 '12 at 13:48
...
Java variable number or arguments for a method
...nd more about it in the Oracle guide on varargs.
Here's an example:
void foo(String... args) {
for (String arg : args) {
System.out.println(arg);
}
}
which can be called as
foo("foo"); // Single arg.
foo("foo", "bar"); // Multiple args.
foo("foo", "bar", "lol"); // Don't matter ...