大约有 6,261 项符合查询结果（耗时：0.0311秒） [XML]
How to move/rename a file using an Ansible task on a remote system
...e the command module to just invoke the appropriate command:
- name: Move foo to bar
command: mv /path/to/foo /path/to/bar
If you want to get fancy then you could first use the stat module to check that foo actually exists:
- name: stat foo
stat: path=/path/to/foo
register: foo_stat
- nam...
“new” keyword in Scala
...he new keyword when you want to refer to a class's own constructor:
class Foo { }
val f = new Foo
Omit new if you are referring to the companion object's apply method:
class Foo { }
object Foo {
def apply() = new Foo
}
// Both of these are legal
val f = Foo()
val f2 = new Foo
If you've m...
What is the difference between a function expression vs declaration in JavaScript? [duplicate]
...d until all declarations are loaded.
Example: Function Expression
alert(foo()); // ERROR! foo wasn't loaded yet
var foo = function() { return 5; }
Example: Function Declaration
alert(foo()); // Alerts 5. Declarations are loaded before any code can run.
function foo() { return 5; }
As for ...
How do I mock an autowired @Value field in Spring with Mockito?
...ls;
ReflectionTestUtils.setField(instanceUnderTest, "defaultUrl", "http://foo");
// Note: Don't use MyClassUnderTest.class, use the instance you are testing itself
// Note: Don't use the referenced string "#{myProps[‘some.default.url']}",
// but simply the FIELDs name ("defaultUrl")
...
What are metaclasses in Python?
...ample of the bits and pieces:
def make_hook(f):
"""Decorator to turn 'foo' method into '__foo__'"""
f.is_hook = 1
return f
class MyType(type):
def __new__(mcls, name, bases, attrs):
if name.startswith('None'):
return None
# Go over attributes and see i...
Usage of __slots__?
...one time in an inheritance tree. For example:
class Base:
__slots__ = 'foo', 'bar'
class Right(Base):
__slots__ = 'baz',
class Wrong(Base):
__slots__ = 'foo', 'bar', 'baz' # redundant foo and bar
Python doesn't object when you get this wrong (it probably should), problems migh...
A definitive guide to API-breaking changes in .NET
... and F# most likely, but untested)
API before change
public static class Foo
{
public static void bar(int i);
}
API after change
public static class Foo
{
public static bool bar(int i);
}
Sample client code working before change
Foo.bar(13);
...
How to do constructor chaining in C#
... (using this like a method) to pick the overload, inside the class:
class Foo
{
private int id;
private string name;
public Foo() : this(0, "")
{
}
public Foo(int id, string name)
{
this.id = id;
this.name = name;
}
public Foo(int id) : this...
Self-references in object literals / initializers
...
Well, the only thing that I can tell you about are getter:
var foo = {
a: 5,
b: 6,
get c() {
return this.a + this.b;
}
}
console.log(foo.c) // 11
This is a syntactic extension introduced by the ECMAScript 5th Edition Specification, the syntax is supported by m...
In what cases do I use malloc and/or new?
...
With regard to calling delete foo when you should call delete []foo, some compilers will fix this automagically for you and not leak and other will only delete the first entry and leak. I had a few of these in some code and valgrind will find them for you...