From 33cabeb04d4dc00f4edf40096f790b510f915dd9 Mon Sep 17 00:00:00 2001
From: Simon Hafner <hafnersimon@gmail.com>
Date: Wed, 5 Sep 2012 17:01:39 -0500
Subject: + random number generator for floats and slices - with tests
I also took the liberty to unify the API between ECMAScript and C.
---
lib/pure/math.nim | 48 ++++++++++++++++++++++++++++++++++--------------
1 file changed, 34 insertions(+), 14 deletions(-)
(limited to 'lib/pure/math.nim')
diff --git a/lib/pure/math.nim b/lib/pure/math.nim
index 587671165..d20fbc2ca 100755
--- a/lib/pure/math.nim
+++ b/lib/pure/math.nim
@@ -123,17 +123,22 @@ proc variance*(x: openarray[float]): float {.noSideEffect.} =
result = result + diff*diff
result = result / toFloat(len(x))
-when not defined(ECMAScript):
- proc random*(max: int): int
- ## returns a random number in the range 0..max-1. The sequence of
- ## random number is always the same, unless `randomize` is called
- ## which initializes the random number generator with a "random"
- ## number, i.e. a tickcount.
- proc randomize*()
- ## initializes the random number generator with a "random"
- ## number, i.e. a tickcount. Note: Does nothing for the ECMAScript target,
- ## as ECMAScript does not support this.
+proc random*(max: int): int
+ ## returns a random number in the range 0..max-1. The sequence of
+ ## random number is always the same, unless `randomize` is called
+ ## which initializes the random number generator with a "random"
+ ## number, i.e. a tickcount.
+proc random*(max: float): float
+ ## returns a random number in the range 0..<max. The sequence of
+ ## random number is always the same, unless `randomize` is called
+ ## which initializes the random number generator with a "random"
+ ## number, i.e. a tickcount.
+proc randomize*()
+ ## initializes the random number generator with a "random"
+ ## number, i.e. a tickcount. Note: Does nothing for the ECMAScript target,
+ ## as ECMAScript does not support this.
+when not defined(ECMAScript):
proc sqrt*(x: float): float {.importc: "sqrt", header: "<math.h>".}
## computes the square root of `x`.
@@ -179,10 +184,19 @@ when not defined(ECMAScript):
# C procs:
proc gettime(dummy: ptr cint): cint {.importc: "time", header: "<time.h>".}
proc srand(seed: cint) {.importc: "srand", nodecl.}
+ proc srand48(seed: cint) {.importc: "srand48", nodecl.}
proc rand(): cint {.importc: "rand", nodecl.}
+ proc drand48(): float {.importc: "drand48", nodecl.}
- proc randomize() = srand(gettime(nil))
- proc random(max: int): int = return int(rand()) mod max
+ var uniqueCounter: int = 0
+ proc randomize() =
+ srand(gettime(nil) + cint(uniqueCounter))
+ srand48(gettime(nil) + cint(uniqueCounter))
+ atomicInc(uniqueCounter)
+ proc random(max: int): int =
+ result = int(rand()) mod max
+ proc random(max: float): float =
+ result = drand48() * max
proc trunc*(x: float): float {.importc: "trunc", nodecl.}
proc floor*(x: float): float {.importc: "floor", nodecl.}
@@ -194,8 +208,11 @@ else:
proc mathrandom(): float {.importc: "Math.random", nodecl.}
proc floor*(x: float): float {.importc: "Math.floor", nodecl.}
proc ceil*(x: float): float {.importc: "Math.ceil", nodecl.}
- proc random*(max: int): int = return int(floor(mathrandom() * float(max)))
- proc randomize*() = nil
+ proc random(max: int): int =
+ result = int(floor(mathrandom() * float(max)))
+ proc random(max: float): float =
+ result = float(mathrandom() * float(max))
+ proc randomize() = nil
proc sqrt*(x: float): float {.importc: "Math.sqrt", nodecl.}
proc ln*(x: float): float {.importc: "Math.log", nodecl.}
@@ -235,6 +252,9 @@ else:
proc `mod`*(x, y: float): float =
result = if y == 0.0: x else: x - y * (x/y).floor
+proc random*[T](x: TSlice[T]): T =
+ result = random(x.b - x.a) + x.a
+
type
TRunningStat* {.pure,final.} = object ## an accumulator for statistical data
n*: int ## number of pushed data
--
cgit 1.4.1-2-gfad0
ew DeVault <sir@cmpwn.com> 2018-01-31 21:18:21 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-31 21:18:21 -0500
Improve logging' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=a21afdaa6bab8f6d05bbe9272700eef571548a59'>a21afda</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=1710c9054898e820700d673e21e7c7a90a3f67b1'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 21:24:50 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 21:31:36 -0500
Parse account configuration' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=b5d5e0dbedee34bd5d3edf13616f055d4f227d36'>b5d5e0d</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2019-05-20 19:20:20 -0400
committer Drew DeVault <sir@cmpwn.com> 2019-05-20 19:28:04 -0400
Load IMAP worker for imap+insecure' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=2dc436555d8bfa6f2409173d87cd0fec2b2385cf'>2dc4365</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=cc90cd21610e7c78bc2cd9b04840fa1266617e6f'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Reto Brunner <reto@labrat.space> 2019-07-18 06:25:42 +0200
committer Drew DeVault <sir@cmpwn.com> 2019-07-19 15:37:55 -0400
Register worker in init.' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6fed04bb9fa43d3886d47d0c845d32fff11569b5'>6fed04b</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=66a9052f0fa8d2caf0d82435241b10e9ba8665b2'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
Initial pass on worker/UI message passing' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>6394e38</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=7d0edcc9e7ecdedb8cabafac1167581d7205596e'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
Initial pass on worker/UI message passing' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>6394e38</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=7d0edcc9e7ecdedb8cabafac1167581d7205596e'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-02-01 18:42:03 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-02-01 18:42:03 -0500
Reduce boilerplate in worker/UI' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=d24e4712a45e03d79fa1ccb71d00c5b830d5a305'>d24e471</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=ee73c419507ef74a78ddd6a3466b605cba140b68'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author emersion <contact@emersion.fr> 2018-01-10 17:19:45 +0100
committer Drew DeVault <ddevault@vistarmedia.com> 2018-01-10 11:20:41 -0500
Misc idiomatic fixes' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=a0be5e80256b98237241b2f3d7825484e7a9c964'>a0be5e8</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=305446abfd66e85fe2c46cb4a07a3abb9fa809a4'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 21:24:50 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 21:31:36 -0500
Parse account configuration' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=b5d5e0dbedee34bd5d3edf13616f055d4f227d36'>b5d5e0d</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Simon Ser <contact@emersion.fr> 2019-04-27 15:56:38 +0000
committer Drew DeVault <sir@cmpwn.com> 2019-04-27 14:28:26 -0400
worker/types: fix Worker.Callbacks race condition' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=9ef2a57b51601cc0e18824bbfe8026891da1a38d'>9ef2a57</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=2159eb876e7e04e81f65e64b1d742ad832890289'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2019-05-20 19:20:20 -0400
committer Drew DeVault <sir@cmpwn.com> 2019-05-20 19:28:04 -0400
Load IMAP worker for imap+insecure' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=2dc436555d8bfa6f2409173d87cd0fec2b2385cf'>2dc4365</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=cc90cd21610e7c78bc2cd9b04840fa1266617e6f'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Reto Brunner <reto@labrat.space> 2019-07-18 06:25:42 +0200
committer Drew DeVault <sir@cmpwn.com> 2019-07-19 15:37:55 -0400
Register worker in init.' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6fed04bb9fa43d3886d47d0c845d32fff11569b5'>6fed04b</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=66a9052f0fa8d2caf0d82435241b10e9ba8665b2'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 21:24:50 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 21:31:36 -0500
Parse account configuration' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=b5d5e0dbedee34bd5d3edf13616f055d4f227d36'>b5d5e0d</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Reto Brunner <reto@labrat.space> 2019-07-18 06:25:42 +0200
committer Drew DeVault <sir@cmpwn.com> 2019-07-19 15:37:55 -0400
Register worker in init.' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6fed04bb9fa43d3886d47d0c845d32fff11569b5'>6fed04b</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=66a9052f0fa8d2caf0d82435241b10e9ba8665b2'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-02-01 18:42:03 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-02-01 18:42:03 -0500
Reduce boilerplate in worker/UI' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=d24e4712a45e03d79fa1ccb71d00c5b830d5a305'>d24e471</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=ee73c419507ef74a78ddd6a3466b605cba140b68'>^</a>
</pre></div><div class='alt'><pre><span class='oid'><a title='author Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
committer Drew DeVault <sir@cmpwn.com> 2018-01-09 20:39:00 -0500
Initial pass on worker/UI message passing' href='/akspecs/aerc/commit/worker/worker.go?h=0.4.0&id=6394e386c2a88c3b376cd422a7b7ce5ae7534984'>6394e38</a></span> <a title='Blame the previous revision' href='/akspecs/aerc/blame/worker/worker.go?h=0.4.0&id=7d0edcc9e7ecdedb8cabafac1167581d7205596e'>^</a>
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