Tutorial by Topics: locks

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

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

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...

A code block is a piece of Python program text that can be executed as a unit, such as a module, a class definition or a function body. Some code blocks (like modules) are normally executed only once, others (like function bodies) may be executed many times. Code blocks may textually contain other c...