像在 Python 中一样使用 zsh 拆分字符串
问题描述：
在蟒蛇中:
s = '1::3'
a = s.split(':')
print a[0] # '1' good
print a[1] # '' good
print a[2] # '3' good
如何用 zsh 达到同样的效果?
How can I achieve the same effect with zsh?
以下尝试失败:
string="1::3"
a=(${(s/:/)string})
echo $a[1] # 1
echo $a[2] # 3 ?? I want an empty string, as in Python
答
解决方案是使用 @ 修饰符，如 zsh 文档:
The solution is to use the @ modifier, as indicated in the zsh docs:
string="1::3"
a=("${(@s/:/)string}") # @ modifier
顺便说一句，如果可以选择分隔符，使用换行符作为分隔符会更容易且更不容易出错.使用 zsh 拆分行的正确方法是:
By the way, if one has the choice of the delimiter, it's much easier and less error prone to use a newline as a delimiter. The right way to split the lines with zsh is then:
a=("${(f)string}")
我不知道这里是否也需要引号...
I don't know whether or not the quotes are necessary here as well...