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one-pipe system means a system of piping between sanitary fixtures and a drain in which both waste and soil water are permitted to flow down a common stack.
Modern homes tend to have a single-pipe system which involves one vertical large-diameter pipe (called a soil stack) running inside the property. In older more traditional homes, it involves a dual-pipe setup. Wastewater and soil water are taken separately to the public sewer system.
The double pipe operator ( || ) is the logical OR operator . In most languages it works the following way: If the first value is false , it checks the second value. If that's true , it returns true and if the second value is false , it returns false .
A pipe is a function or operator that allows us to pass the output of a function as the input of another. JavaScript and TypeScript don't support pipes natively (as an operator), but we can implement our pipes using the following function: const pipe = <T>(... fns: Array<(arg: T) => T>) => (value: T) => fns.
This is a bitwise or.
Since bitwise operations only make sense on integers, 0.5 is truncated.
x | 0 is x, if x is an integer.
Bit comparison is so simple it's almost incomprehensible ;) Check out this "nybble"
8 4 2 1
-------
0 1 1 0 = 6 (4 + 2)
1 0 1 0 = 10 (8 + 2)
=======
1 1 1 0 = 14 (8 + 4 + 2)
Bitwise ORing 6 and 10 will give you 14:
alert(6 | 10); // should show 14
Terribly confusing!
A single pipe is a bit-wise OR.
Performs the OR operation on each pair of bits. a OR b yields 1 if either a or b is 1.
JavaScript truncates any non-integer numbers in bitwise operations, so its computed as 0|0, which is 0.
This example will help you.
var testPipe = function(input) {
console.log('input => ' + input);
console.log('single pipe | => ' + (input | 'fallback'));
console.log('double pipe || => ' + (input || 'fallback'));
console.log('-------------------------');
};
testPipe();
testPipe('something');
testPipe(50);
testPipe(0);
testPipe(-1);
testPipe(true);
testPipe(false);If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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