Linux数组，去掉反复的数值
日期：2014-05-16 浏览次数：20736 次
Linux数组，去掉重复的数值
#!/bin/sh
array=("java" "linux" "c" "linux" "c++" "java")
len=${#array[@]}
for((i=0;i<$len;i++))
do
for((j=$len-1;j>i;j--))
do
if [[ ${array[i]} = ${array[j]} ]];then
unset array[i]
fi
done
done
for arr in ${array[@]}
do
echo $arr
done
[root@bogon shell]# ./array1.sh
c
linux
c++
java
以上代码，处理后的数组，如果用下标来访问数组元素，不一定准确。所以，后来将处理完后的数组元素值，重新赋给新的数组了。如下：
array1=("nbi_db" "information_schema" "mysql" "performance_schema" "test" "nbi_db")
length=${#array1[@]}
for (( i=0; i<$length; i++ )); do
for (( j=$(expr $length - 1); j>$i; j-- ));do
if [[ "${array1[$i]}" = "${array1[$j]}" ]];then
unset array1[$i]
fi
done
done
echo "array1 for ... in--------------"
index=0
for arr in ${array1[@]}
do
echo "[$index] "$arr
((index++))
done
echo
echo "array1 for iterator------------"
for ((index=0;index<$length;index++))
do
echo "[$index] "${array1[$index]}
done
echo
index=0
for arr in ${array1[@]};do
array2[$index]=$arr
((index++))
done
echo
length=${#array2[@]}
for ((index=0;index<$length;index++))
do
echo "array2[$index]="${array2[$index]}
done
运行结果：
array1 for ... in--------------
[0] information_schema
[1] mysql
[2] performance_schema
[3] test
[4] nbi_db
array1 for iterator------------
[0]
[1] information_schema
[2] mysql
[3] performance_schema
[4] test
[5] nbi_db
array2[0]=information_schema
array2[1]=mysql
array2[2]=performance_schema
array2[3]=test
array2[4]=nbi_db
#!/bin/sh
array=("java" "linux" "c" "linux" "c++" "java")
len=${#array[@]}
for((i=0;i<$len;i++))
do
for((j=$len-1;j>i;j--))
do
if [[ ${array[i]} = ${array[j]} ]];then
unset array[i]
fi
done
done
for arr in ${array[@]}
do
echo $arr
done
[root@bogon shell]# ./array1.sh
c
linux
c++
java
以上代码，处理后的数组，如果用下标来访问数组元素，不一定准确。所以，后来将处理完后的数组元素值，重新赋给新的数组了。如下：
array1=("nbi_db" "information_schema" "mysql" "performance_schema" "test" "nbi_db")
length=${#array1[@]}
for (( i=0; i<$length; i++ )); do
for (( j=$(expr $length - 1); j>$i; j-- ));do
if [[ "${array1[$i]}" = "${array1[$j]}" ]];then
unset array1[$i]
fi
done
done
echo "array1 for ... in--------------"
index=0
for arr in ${array1[@]}
do
echo "[$index] "$arr
((index++))
done
echo
echo "array1 for iterator------------"
for ((index=0;index<$length;index++))
do
echo "[$index] "${array1[$index]}
done
echo
index=0
for arr in ${array1[@]};do
array2[$index]=$arr
((index++))
done
echo
length=${#array2[@]}
for ((index=0;index<$length;index++))
do
echo "array2[$index]="${array2[$index]}
done
运行结果：
array1 for ... in--------------
[0] information_schema
[1] mysql
[2] performance_schema
[3] test
[4] nbi_db
array1 for iterator------------
[0]
[1] information_schema
[2] mysql
[3] performance_schema
[4] test
[5] nbi_db
array2[0]=information_schema
array2[1]=mysql
array2[2]=performance_schema
array2[3]=test
array2[4]=nbi_db
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