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Difference between this and self in JavaScript
...nd is not in strict mode, this defaults to window, and therefore
function foo() {
console.log(
window.self === window, // is self window?
window.self === this, // is self this?
this === window // is this window?
);
}
foo(); // true true true
If you're usi...
How to convert URL parameters to a JavaScript object?
....replace(/&/g, '","').replace(/=/g,'":"') + '"}')
Example
Parse abc=foo&def=%5Basf%5D&xyz=5 in five steps:
decodeURI: abc=foo&def=[asf]&xyz=5
Escape quotes: same, as there are no quotes
Replace &: abc=foo","def=[asf]","xyz=5
Replace =: abc":"foo","def":"[asf]","xyz":"5
...
Django migration strategy for renaming a model and relationship fields
...0001_initial'),
]
operations = [
migrations.RenameModel('Foo', 'Bar'),
migrations.RenameField('AnotherModel', 'foo', 'bar'),
migrations.RenameField('YetAnotherModel', 'foo', 'bar')
]
You may get some errors if you don't update the names where it's imported e.g...
C/C++ with GCC: Statically add resource files to executable/library
...t.
I have used objcopy (GNU binutils) to link the binary data from a file foo-data.bin into the data section of the executable:
objcopy -B i386 -I binary -O elf32-i386 foo-data.bin foo-data.o
This gives you a foo-data.o object file which you can link into your executable. The C interface looks s...
SQL injection that gets around mysql_real_escape_string()
...@shadyyx: As for passing such funkiness in $_GET... ?var=%BF%27+OR+1=1+%2F%2A in the URL, $var = $_GET['var']; in the code, and Bob's your uncle.
– cHao
Dec 27 '12 at 6:15
...
Are strongly-typed functions as parameters possible in TypeScript?
...type must be "function that accepts a number and returns type any":
class Foo {
save(callback: (n: number) => any) : void {
callback(42);
}
}
var foo = new Foo();
var strCallback = (result: string) : void => {
alert(result);
}
var numCallback = (result: number) : void =&g...
When monkey patching an instance method, can you call the overridden method from the new implementat
...nce
So, if at all possible, you should prefer something like this:
class Foo
def bar
'Hello'
end
end
class ExtendedFoo < Foo
def bar
super + ' World'
end
end
ExtendedFoo.new.bar # => 'Hello World'
This works, if you control creation of the Foo objects. Just change every ...
Meaning of 'const' last in a function declaration of a class?
...t;iostream>
class MyClass
{
private:
int counter;
public:
void Foo()
{
std::cout << "Foo" << std::endl;
}
void Foo() const
{
std::cout << "Foo const" << std::endl;
}
};
int main()
{
MyClass cc;
const MyClass&...
How does “this” keyword work within a function?
...ly.
As a Method
A method is a function that's attached to an object
var foo = {};
foo.someMethod = function(){
alert(this);
}
When invoked as a method, this will be bound to the object the function/method is a part of. In this example, this will be bound to foo.
As A Function
If you have...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...其他原始数据类型。
如果你需要实现一个数组用来存放(Foo,Bar)的对象，尝试分解为Foo[]与Bar[]要比(Foo,Bar)好很多。(当然，为了某些好的API的设计，可以适当做一些妥协。但是在自己的代码内部，你应该多多使用分解后的容易。
...