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Merge branch 'tumdum-patch-1' of https://github.com/tumdum/til into tumdum-tumdum-patch-1

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Conflicts:
	go/not-so-random.md
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jbranchaud
2016-02-14 14:11:10 -06:00
parent a3a975b001 1c0935878c
commit 0cda5e4f63
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go/not-so-random.md
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@@ -1,12 +1,7 @@
# Not So Random
Go's `rand` package makes it easy to generate all sorts of pseudo-random numbers.
What they don't tell you though is that the default seed is `1`. They [do
tell you that the numbers are pseudo-random and that you need to use the
`Seed` function to initialize the default source if different behavior is
required for each run](https://golang.org/pkg/math/rand/), though. So if you
write a program like so:
Go's `rand` package makes it easy to generate all sorts of pseudo-random
numbers. So if you write a program like so:
```go
package main
@@ -31,8 +26,9 @@ and then run it, you will get output like:
three
```
and any subsequent runs of the program will continue to produce `three`. Not
exactly what we are looking for.
and any subsequent runs of the program will continue to produce `three`. This
is because the default seed for global functions in `math/rand` is
[specified](https://golang.org/pkg/math/rand/#Seed) as `1`.
If you want your program to be a little less predictable, you will want to
seed it yourself, perhaps with the current time, instead of `1`. Try adding