Bob Nystrom
6bda720b71
Add a custom Pygments lexer plug-in for Wren syntax highlighting, update contributing docs with setup instructions for the lexer, and switch every `:::dart` annotation across all doc/site markdown files to `:::wren` so code examples render with the correct language grammar.
1.3 KiB
^title System Class ^category core
The System class is a grab-bag of functionality exposed by the VM, mostly for use during development or debugging.
Static Methods
System.print()
Prints a single newline to the console.
System.print(object)
Prints [object] to the console followed by a newline. If not already a string,
the object is converted to a string by calling toString on it.
:::wren
System.print("I like bananas") // Prints "I like bananas".
System.printAll(sequence)
Iterates over [sequence] and prints each element, then prints a single newline
at the end. Each element is converted to a string by calling toString on it.
:::wren
System.printAll([1, [2, 3], 4]) // Prints "1[2, 3]4".
System.write(object)
Prints a single value to the console, but does not print a newline character
afterwards. Converts the value to a string by calling toString on it.
:::wren
System.write(4 + 5) // Prints "9".
In the above example, the result of 4 + 5 is printed, and then the prompt is
printed on the same line because no newline character was printed afterwards.
System.clock
Returns the number of seconds (including fractional seconds) since the program was started. This is usually used for benchmarking.