字符串分割到数组 [英] Splitting string into array

问题描述

我要拆分的字符串并构建阵列。我想下面的code：

I want to split the string and construct the array. I tried the below code:

myString="first column:second column:third column"
set -A myArray `echo $myString | awk 'BEGIN{FS=":"}{for (i=1; i<=NF; i++) print $i}'`
# Following is just to make sure that array is constructed properly
i=0
while [ $i -lt ${#myArray[@]} ]
do
echo "Element $i:${myArray[$i]}"
(( i=i+1 ))
done
exit 0

It produces the following result:
Element 0:first
Element 1:column
Element 2:second
Element 3:column
Element 4:third
Element 5:column

This is not what I want it to be. When I construct the array, I want that array to contain only three elements.
Element 0:first column
Element 1:second column
Element 2:third column

您可以请指教？

推荐答案

下面是我会怎样处理这个问题：使用IFS变量来告诉你要拆分的字符串转换成冒号分隔的标记外壳（bash）的。

Here is how I would approach this problem: use the IFS variable to tell the shell (bash) that you want to split the string into colon-separated tokens.

$ cat split.sh
#!/bin/sh

# Script to split fields into tokens

# Here is the string where tokens separated by colons
s="first column:second column:third column"

IFS=":"     # Set the field separator
set $s      # Breaks the string into $1, $2, ...
i=0
for item    # A for loop by default loop through $1, $2, ...
do
    echo "Element $i: $item"
    ((i++))
done

运行：

$ ./split.sh
Element 0: first column
Element 1: second column
Element 2: third column

这篇关于字符串分割到数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！