go語言小練習——給定英語文章統計單詞數量

　　給定一篇英語文章，要求統計出所有單詞的個數，並按一定次序輸出。思路是利用go語言的map類型，以每個單詞作為關鍵字存儲數量信息，代碼實現如下：

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 func wordCounterV1(str string) {
 9     /*定義變數*/
10     stringSlice := str[:]
11     temp := str[:]
12     wordStatistic := make(map[string]int)
13 
14     /*把所有出現的單詞放入map中*/
15     j := 0
16     for i := 0; i < len(stringSlice); i++ {
17         if !((stringSlice[i] >= 65 && stringSlice[i] <= 90) || (stringSlice[i] >= 97 && stringSlice[i] <= 122)) {
18             temp = str[j:i]
19             if len(temp) != 0 {
20                 wordStatistic[temp]++
21             }
22             j = i + 1
23         }
24     }
25 
26     /*把首字母為大寫的單詞轉換為小寫;去除無效字元*/
27     for i := range wordStatistic {
28         if len(i) > 1 {
29             if (i[0] >= 65 && i[0] <= 90) && (i[1] <= 65 || i[1] >= 90) {
30                 strTemp := make([]byte, len(i), len(i))
31                 copy(strTemp, i)
32                 strTemp[0] += 32
33                 wordStatistic[string(strTemp)] += wordStatistic[i]
34                 delete(wordStatistic, i)
35             }
36         } else {
37             if i[0] != 'a' && i[0] != 'A' {
38                 delete(wordStatistic, i)
39             } else if i[0] == 'A' {
40                 wordStatistic["a"] += wordStatistic[i]
41                 delete(wordStatistic, i)
42             }
43         }
44 
45     }
46 
47     /*把map的關鍵字映射到string切片進行排序*/
48     sortSlice := make([]string, 0, len(wordStatistic))
49     for i := range wordStatistic {
50         sortSlice = append(sortSlice, i)
51     }
52     sort.Strings(sortSlice)
53 
54     /*輸出結果*/
55     for _, v := range sortSlice {
56         fmt.Printf("%s:%d\n", v, wordStatistic[v])
57     }
58     fmt.Printf("word count:%d\n", len(wordStatistic))
59 }

　　主函數隨便輸入一篇英語文章

func main() {

    str := `    There are moments in life when you miss someone so much 
    that you just want to pick them from your dreams and hug them for 
    real! Dream what you want to dream;go where you want to go;be what 
    you want to be,because you have only one life and one chance to do 
    all the things you want to do.

    　　May you have enough happiness to make you sweet,enough trials
     to make you strong,enough sorrow to keep you human,enough hope to
      make you happy? Always put yourself in others’shoes.If you feel
       that it hurts you,it probably hurts the other person, too.
    
    　　The happiest of people don’t necessarily have the best of
     everything;they just make the most of everything that comes along
      their way.Happiness lies for those who cry,those who hurt, those
       who have searched,and those who have tried,for only they can
        appreciate the importance of people
    
    　　who have touched their lives.Love begins with a smile,grows with
     a kiss and ends with a tear.The brightest future will always be based
      on a forgotten past, you can’t go on well in life until you let go of
       your past failures and heartaches.
    
    　　When you were born,you were crying and everyone around you was smiling.
    Live your life so that when you die,you're the one who is smiling and
     everyone around you is crying.
    
    　　Please send this message to those people who mean something to you,
    to those who have touched your life in one way or another,to those who 
    make you smile when you really need it,to those that make you see the 
    brighter side of things when you are really down,to those who you want
     to let them know that you appreciate their friendship.And if you don’t,
      don’t worry,nothing bad will happen to you,you will just miss out on 
      the opportunity to brighten someone’s day with this message.`


　　//調用功能
    wordCounterV1(str)
}

　　編譯後終端輸出結果：

C:\Users\24213\go project>cd src\github.com\go-study\lesson6\practice1

C:\Users\24213\go project\src\github.com\go-study\lesson6\practice1>go build

C:\Users\24213\go project\src\github.com\go-study\lesson6\practice1>practice1
a:4
all:1
along:1
always:2
and:8
another:1
appreciate:2
are:2
around:2
bad:1
based:1
be:3
because:1
begins:1
best:1
born:1
brighten:1
brighter:1
brightest:1
can:2
chance:1
comes:1
cry:1
crying:2
day:1
die:1
do:2
don:3
down:1
dream:2
dreams:1
ends:1
enough:4
everyone:2
everything:2
failures:1
feel:1
for:3
forgotten:1
friendship:1
from:1
future:1
go:4
grows:1
happen:1
happiest:1
happiness:2
happy:1
have:7
heartaches:1
hope:1
hug:1
human:1
hurt:1
hurts:2
if:2
importance:1
in:4
is:2
it:3
just:3
keep:1
kiss:1
know:1
let:2
lies:1
life:5
live:1
lives:1
love:1
make:6
may:1
mean:1
message:2
miss:2
moments:1
most:1
much:1
necessarily:1
need:1
nothing:1
of:6
on:3
one:4
only:2
opportunity:1
or:1
other:1
others:1
out:1
past:2
people:3
person:1
pick:1
please:1
probably:1
put:1
re:1
real:1
really:2
searched:1
see:1
send:1
shoes:1
side:1
smile:2
smiling:2
so:2
someone:2
something:1
sorrow:1
strong:1
sweet:1
tear:1
that:6
the:10
their:3
them:3
there:1
they:2
things:2
this:2
those:9
to:19
too:1
touched:2
trials:1
tried:1
until:1
want:6
was:1
way:2
well:1
were:2
what:2
when:5
where:1
who:10
will:3
with:4
worry:1
you:32
your:4
yourself:1
word count:144