数组比较
# Tutorial
数组比较 Shell可以处理数组 数组是包含多个值的变量。任何变量都可以用作数组。数组的大小没有最大限制,也没有要求成员变量被连续索引或连续分配。 数组从零开始:第一个元素的编号为0。
# basic construct
# array=(value1 value2 ... valueN)
array=(23 45 34 1 2 3)
#To refer to a particular value (e.g. : to refer 3rd value)
echo ${array[2]}
#To refer to all the array values
echo ${array[@]}
#To evaluate the number of elements in an array
echo ${#array[@]}
# Exercise
在本练习中,您将需要比较三个数组列表并编写所有三个数组的公共元素:
a=(3 5 8 10 6)
,b=(6 5 4 12)
,c=(14 7 5 7)
结果是共同点5。
# Tutorial Code
#!/bin/bash # enter your array comparison code here
# Expected Output
5
# Solution
#!/bin/bash
# enter your array comparison code here
# initialize arrays a b c
a=(3 5 8 10 6)
b=(6 5 4 12)
c=(14 7 5 7)
#comparison of first two arrays a and b
for x in "${a[@]}"; do
in=false
for y in "${b[@]}"; do
if [ $x = $y ];then
# assigning the matching results to new array z
z[${#z[@]}]=$x
fi
done
done
#comparison of third array c with new array z
for i in "${c[@]}"; do
in=false
for k in "${z[@]}"; do
if [ $i = $k ];then
# assigning the matching results to new array j
j[${#j[@]}]=$i
fi
done
done
# print content of array j
echo ${j[@]}
上次更新: 2024/05/11, 17:55:08