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What does @synchronized() do as a singleton method in objective C?
...dit: Adding some more information that wasn't in the original answer from 2011.
The @synchronized directive prevents multiple threads from entering any region of code that is protected by a @synchronized directive referring to the same object. The object passed to the @synchronized directive is the...
req.query and req.param in ExpressJS
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110
req.query will return a JS object after the query string is parsed.
/user?name=tom&age=55 -...
How do I fix a merge conflict due to removal of a file in a branch?
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edited Mar 6 '14 at 20:23
answered Sep 4 '09 at 18:23
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Class type check in TypeScript
...t be used there anymore:
The is operator, which is new for ActionScript 3.0, allows you to test whether a variable or expression is a member of a given data type. In previous versions of ActionScript, the instanceof operator provided this functionality, but in ActionScript 3.0 the instanceof operat...
Create Django model or update if exists
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bakkalbakkal
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NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...工作依靠21号中断(int 21h)来完成，并且BIOS服务中断用int 10h和int 16h，在linux中，所有的函数通过linux系统调用最终被内核处理，并且通过int 80h陷入内核代替用户空间执行，这称为linux的软中断(关于软中断，这里不细讲，我以后会...
How to create a unique index on a NULL column?
I am using SQL Server 2005. I want to constrain the values in a column to be unique, while allowing NULLS.
4 Answers
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shortcut for creating a Map from a List in groovy?
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120
I've recently came across the need to do exactly that: converting a list into a map. This questi...
EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
...(var failure in ex.EntityValidationErrors) {
sb.AppendFormat("{0} failed validation\n", failure.Entry.Entity.GetType());
foreach (var error in failure.ValidationErrors) {
sb.AppendFormat("- {0} : {1}", error.PropertyName, error.ErrorMessage);
s...
Asynchronous Process inside a javascript for loop [duplicate]
... maintain the index uniquely for you (second example shown below).
As of 2016, if you have a fully up-to-spec ES6 implementation of Javascript, you can also use let to define the for loop variable and it will be uniquely defined for each iteration of the for loop (third implementation below). But,...