Tutorial by Topics: lock

Proc.new(block) lambda { |args| code } ->(arg1, arg2) { code } object.to_proc { |single_arg| code } do |arg, (key, value)| code end Be careful about operator precedence when you have a line with multiple methods chained, like: str = "abcdefg" puts str.gsub(/./) do |mat...

// Declare as a local variable: returnType (^blockName)(parameterType1, parameterType2, ...) = ^returnType(argument1, argument2, ...) {...}; // Declare as a property: @property (nonatomic, copy, nullability) returnType (^blockName)(parameterTypes); // Declare as a method parameter: ...

lock (obj) {} Using the lock statement you can control different threads' access to code within the code block. It is commonly used to prevent race conditions, for example multiple threads reading and removing items from a collection. As locking forces threads to wait for other threads to ...

always @ (posedge clk) begin /* statements */ end always @ (negedge clk) begin /* statements */ end always @ (posedge clk or posedge reset) // may synthesize less efficiently than synchronous reset

Why is there a GIL? The GIL has been around in CPython since the inception of Python threads, in 1992. It's designed to ensure thread safety of running python code. Python interpreters written with a GIL prevent multiple native threads from executing Python bytecodes at once. This makes it e...

Blocks in CUDA operate semi-independently. There is no safe way to synchronize them all. However, it does not mean that they cannot interact with each other in any way.

[A block formatting context is a part of a visual CSS rendering of a Web page. It is the region in which the layout of block boxes occurs and in which floats interact with each other.][1] [1]: https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Block_formatting_context MDN

LOCK TABLES table_name [READ | WRITE]; // Lock Table UNLOCK TABLES; // Unlock Tables Locking is used to solve concurrency problems.Locking is required only when running a transaction, that first read a value from a database and later write that value in to the database. Locks are n...

I found this link - it's useful as a reference: "Isolation Levels"

int fcntl(int fd, int cmd, struct flock*); int lockf(int fd, int cmd, off_t len);

Since they are unnamed, anonymous blocks cannot be referenced by other program units.

As a variable: returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...}; As a property: @property (nonatomic, copy) returnType (^blockName)(parameterTypes); As a method parameter: - (void)methodWithBlock:(returnType (^)(parameterTypes))blockName; As a typedef: ...

The UNLOCK statement explicitly releases any record locks associated with a file connector.

From Swift Documentarion A closure is said to escape a function when the closure is passed as an argument to the function, but is called after the function returns. When you declare a function that takes a closure as one of its parameters, you can write @escaping before the parameter’s type to indi...

MKBlockQueue allows you to create a chain of blocks and execute them one after the other in a queue. Compared with NSOperation, with MKBlockQueue you decide yourself when a block is complete and when you want the queue to continue. You can also pass data from one block to the next. https://github.c...