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...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。
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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...
Passing arguments to “make run”
...gn followed by the name of the variable in parentheses or braces: either $(foo)' or ${foo}' is a valid reference to the variable `foo'." and proceeds to give examples where only $() is used. Ah well.
– Jakob Borg
Feb 7 '10 at 20:30
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Send an Array with an HTTP Get
...ffers a dedicated method to obtain multiple parameter values as an array.
foo=value1&foo=value2&foo=value3
String[] foo = request.getParameterValues("foo"); // [value1, value2, value3]
The request.getParameter("foo") will also work on it, but it'll return only the first value.
String...
TypeScript function overloading
...Script, you only have one implementation with multiple signatures.
class Foo {
myMethod(a: string);
myMethod(a: number);
myMethod(a: number, b: string);
myMethod(a: any, b?: string) {
alert(a.toString());
}
}
Only the three overloads are recognized by TypeScript as po...
Select all elements with “data-” attribute without using jQuery
...ct all DOM elements that have a certain data- attribute (let's say data-foo ). The elements may be different tag elements.
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Efficiency of Java “Double Brace Initialization”?
In Hidden Features of Java the top answer mentions Double Brace Initialization , with a very enticing syntax:
15 Answe...
Should I use a class or dictionary?
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@Ralf A class Foo is merely a type, like int and string. Do you store value in an integer type or variable foo of integer type? Subtle, but important semantic difference. In languages like C this distinction is not too relevant outside of ...
How to store printStackTrace into a string [duplicate]
How can I get the e.printStackTrace() and store it into a String variable?
I want to use the string generated by e.printStackTrace() later in my program.
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uppercase first character in a variable with bash
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foo="$(tr '[:lower:]' '[:upper:]' <<< ${foo:0:1})${foo:1}"
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