arr=[4,5,6]
print arr.join(","),"\n" #4,5,6
#print arr.join(", "),"\n" 意思是：將陣列arr轉換成字串輸出，用", "隔開每個元素，並且換行。
arr[4]="m" #把4號索引為止元素賦值為"m"
print arr.join(","),"\n" #4,5,6,,m
print arr[3],"\n" #列印3號索引位置元素 #nil
arr.delete_at(3) #刪除3號索引位置元素
print arr.join(","),"\n" #4,5,6,m
arr[2]=["a","b","c"] #把2號索引位置元素賦值為["a","b","c"]
print arr.join(","),"\n" #4,5,a,b,c,m
arr[0..1]=[7,"h","b"] #把0..1號元素替換為7,"h","b"
print arr.join(","),"\n" #7,h,b,a,b,c,m
arr.push("b") #加入元素"b"
print arr.join(","),"\n" #7,h,b,a,b,c,m,b
arr.delete(["a","b","c"]) #刪除元素["a","b","c"]
print arr.join(","),"\n" #7,h,b,m,b
arr.delete("b") #刪除所有元素"b"
print arr.join(","),"\n" #7,h,m
arr.insert(3,"d") #在3號索引位置插入元素"d"
print arr.join(","),"\n" #7,h,m,d
arr<<'f'<<2 #加入元素"f";加入元素2
print arr.join(","),"\n" #7,h,m,d,f,2
arr.pop #刪除尾元素
print arr.join(","),"\n" #7,h,m,d,f,
arr.shift #刪除首元素
print arr.join(","),"\n" #h,m,d,f,
arr.clear #清空陣列arr
print arr.join(","),"\n" #
aaaa=["aa",4,5,"bb"]
bbbb=[4,1,3,2,5]
print aaaa+bbbb,"\n" #aa 4 5 bb 41325
print aaaa*2,"\n" #aa 45 bb aa 45 bb
print bbbb-aaaa,"\n" #132
#並運算;交運算
print aaaa|bbbb ,"\n" #aa 45 bb 132
print aaaa&bbbb , "\n" #45
#排序;倒置
print bbbb.sort.join(",") ,"\n" #1,2,3,4,5
print aaaa.reverse,"\n" #bb54aa
str1='this is str1'
str2="this is str2"
str3=%q/this is str3/
str4=%q/this is str4/
str5=<； ( )； [ ] ；；等等。
str5是乙個字串文件，從 《和文件結束符的下一行開始，直到遇到乙個放置在行首的文件結束符，結束整個字串文件。
str="this is you string."
puts str*2 #this is you string.this is you string.
str="this is you string.\n"
puts str*2 #this is you string.
#this is you string.
str="\tthis is you string."
puts str # this is you string.
str='this\'s you string.\n'
puts str #this\`s you string.\n
單引號括起來的字串並不會對字串作任何解釋，你看到的是什麼便是什
麼，有乙個例外：單引號字串裡的 單引號 需要轉義。
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