go slicearray 源码
golang slicearray 代码
文件路径：/test/ken/slicearray.go
// run
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test basic operations of slices and arrays.
package main
var bx [10]byte
var by []byte
var fx [10]float64
var fy []float64
var lb, hb int
var t int
func main() {
lb = 0
hb = 10
by = bx[0:]
tstb()
lb = 0
hb = 10
fy = fx[0:]
tstf()
// width 1 (byte)
lb = 0
hb = 10
by = bx[lb:hb]
tstb()
by = bx[lb:10]
tstb()
by = bx[lb:]
tstb()
by = bx[:hb]
tstb()
by = bx[0:hb]
tstb()
by = bx[0:10]
tstb()
by = bx[0:]
tstb()
by = bx[:10]
tstb()
by = bx[:]
tstb()
lb = 2
hb = 10
by = bx[lb:hb]
tstb()
by = bx[lb:10]
tstb()
by = bx[lb:]
tstb()
by = bx[2:hb]
tstb()
by = bx[2:10]
tstb()
by = bx[2:]
tstb()
lb = 0
hb = 8
by = bx[lb:hb]
tstb()
by = bx[lb:8]
tstb()
by = bx[0:hb]
tstb()
by = bx[0:8]
tstb()
by = bx[:8]
tstb()
by = bx[:hb]
tstb()
lb = 2
hb = 8
by = bx[lb:hb]
tstb()
by = bx[lb:8]
tstb()
by = bx[2:hb]
tstb()
by = bx[2:8]
tstb()
// width 8 (float64)
lb = 0
hb = 10
fy = fx[lb:hb]
tstf()
fy = fx[lb:10]
tstf()
fy = fx[lb:]
tstf()
fy = fx[:hb]
tstf()
fy = fx[0:hb]
tstf()
fy = fx[0:10]
tstf()
fy = fx[0:]
tstf()
fy = fx[:10]
tstf()
fy = fx[:]
tstf()
lb = 2
hb = 10
fy = fx[lb:hb]
tstf()
fy = fx[lb:10]
tstf()
fy = fx[lb:]
tstf()
fy = fx[2:hb]
tstf()
fy = fx[2:10]
tstf()
fy = fx[2:]
tstf()
lb = 0
hb = 8
fy = fx[lb:hb]
tstf()
fy = fx[lb:8]
tstf()
fy = fx[:hb]
tstf()
fy = fx[0:hb]
tstf()
fy = fx[0:8]
tstf()
fy = fx[:8]
tstf()
lb = 2
hb = 8
fy = fx[lb:hb]
tstf()
fy = fx[lb:8]
tstf()
fy = fx[2:hb]
tstf()
fy = fx[2:8]
tstf()
}
func tstb() {
t++
if len(by) != hb-lb {
println("t=", t, "lb=", lb, "hb=", hb,
"len=", len(by), "hb-lb=", hb-lb)
panic("fail")
}
if cap(by) != len(bx)-lb {
println("t=", t, "lb=", lb, "hb=", hb,
"cap=", cap(by), "len(bx)-lb=", len(bx)-lb)
panic("fail")
}
for i := lb; i < hb; i++ {
if bx[i] != by[i-lb] {
println("t=", t, "lb=", lb, "hb=", hb,
"bx[", i, "]=", bx[i],
"by[", i-lb, "]=", by[i-lb])
panic("fail")
}
}
by = nil
}
func tstf() {
t++
if len(fy) != hb-lb {
println("t=", t, "lb=", lb, "hb=", hb,
"len=", len(fy), "hb-lb=", hb-lb)
panic("fail")
}
if cap(fy) != len(fx)-lb {
println("t=", t, "lb=", lb, "hb=", hb,
"cap=", cap(fy), "len(fx)-lb=", len(fx)-lb)
panic("fail")
}
for i := lb; i < hb; i++ {
if fx[i] != fy[i-lb] {
println("t=", t, "lb=", lb, "hb=", hb,
"fx[", i, "]=", fx[i],
"fy[", i-lb, "]=", fy[i-lb])
panic("fail")
}
}
fy = nil
}
func init() {
for i := 0; i < len(bx); i++ {
bx[i] = byte(i + 20)
}
by = nil
for i := 0; i < len(fx); i++ {
fx[i] = float64(i + 20)
}
fy = nil
}
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