uuid() {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1)
}
return (
s4() + s4() + "-" + s4() + "-" + s4() + "-" + s4() + "-" + s4() + s4() + s4()
)
}what does this code mean and what can it be used for?
generates a random id. Used as a key.
is generally used to generate unique key, that is, a unique id, is used to uniquely identify data.
there are many algorithms for generating timestamps, random numbers, and so on
generate a non-repeating string
this is to generate a string, but the one you posted is obviously not a standard implementation.
unique user id, but the code written above does not guarantee unique
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