大约有 12,000 项符合查询结果（耗时：0.0452秒） [XML]
Default constructor vs. inline field initialization
... better and it is.
This is less verbose and more straight :
public class Foo {
private int x = 5;
private String[] y = new String[10];
}
than the constructor way :
public class Foo{
private int x;
private String[] y;
public Foo(){
x = 5;
y = new String[10];
...
Absolute vs relative URLs
...
See this: http://en.wikipedia.org/wiki/URI_scheme#Generic_syntax
foo://username:password@example.com:8042/over/there/index.dtb;type=animal?name=ferret#nose
\ / \________________/\_________/ \__/ \___/ \_/ \_________/ \_________/ \__/
| | | | ...
How to change variables value while debugging with LLDB in Xcode?
...
expr myString = @"Foo"
(lldb) help expr
Evaluate a C/ObjC/C++ expression in the current
program context, using variables currently in scope. This command
takes 'raw' input (no need to quote stuff).
Syntax: expression --...
Using global variables in a function
...t, it is assumed to be global.
>>> import dis
>>> def foo():
... global bar
... baz = 5
... print bar
... print baz
... print quux
...
>>> dis.disassemble(foo.func_code)
3 0 LOAD_CONST 1 (5)
3 STORE_FAST ...
What's the difference between parenthesis $() and curly bracket ${} syntax in Makefile?
... followed by the
name of the variable in parentheses or braces: either $(foo) or
${foo} is a valid reference to the variable foo.
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Is a memory leak created if a MemoryStream in .NET is not closed?
... hiding means you may at some future point want to refactor:
MemoryStream foo()
{
MemoryStream ms = new MemoryStream();
// write stuff to ms
return ms;
}
to:
Stream foo()
{
...
}
This emphasizes that callers should not care what kind of Stream is being returned, ...
How do you reverse a string in place in JavaScript?
...r, there are some problems with this solution. For example:
naiveReverse('foo ???? bar');
// → 'rab �� oof'
// Where did the `????` symbol go? Whoops!
If you’re wondering why this happens, read up on JavaScript’s internal character encoding. (TL;DR: ???? is an astral symbol, and JavaScr...
CodeIgniter - accessing $config variable in view
...->item() works fine.
For example, if the config file contains $config['foo'] = 'bar'; then $this->config->item('foo') == 'bar'
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Creating C formatted strings (not printing them)
...h>
#include <stdio.h>
// a function that accepts a string:
void foo( char* s);
// You'd like to call a function that takes a format string
// and then calls foo():
void foofmt( char* fmt, ...)
{
char buf[100]; // this should really be sized appropriately
...
PHP json_encode encoding numbers as strings
...$arr["var"], "float") to fix it.
<?php
class testclass {
public $foo = 1;
public $bar = 2;
public $baz = "Hello, world";
}
$testarr = array( 'foo' => 1, 'bar' => 2, 'baz' => 'Hello, world');
$json_obj_txt = json_encode(new testclass());
$json_arr_txt = json_encode($testa...