http://is.js.org/

Try

is.deepEqual(new Date("2012-12-12T00:30:00.000Z"), new Date("2021-11-11T13:12:00.000Z"))

Expected

false because dates are different (timestamps are 1355272200000 and 1636636320000)

Actual

true

"is" version: 1.0.2
node: 6.2.0

There are operations (mostly bit-wise), which convert number to signed (and sometimes unsigned) 32-bit integer.

• Math.imul(1e15, 1e16) === -2147483648
• 1 << 31 === -2147483648
• 1e11 & -1 === 1215752192
• 1e10 ^ 3e10 === -1473755136

but there is also unsigned right shift, which converts to 32-bit unsigned int: -1 >>> 0 === 4294967295.

This is not needed very often, but might be useful.

how can we check is ipv4 or ipv6 address ?

is valid ipv4 address ?

216.239.59.128

is valid ipv6 address ?

3ffe:1900:4545:3:200:f8ff:fe21:67cf