awk中split函数的用法

The awk function split(s,a,sep) splits a string s into an awk array a using the delimiter sep.

time=12:34:56
echo $time | awk ‘{split($0,a,":" ); print a[1]}‘
12
 
echo $time | awk ‘{split($0,a,":" ); print a[3]}‘
34
 
echo $time | awk ‘{split($0,a,":" ); print a[1]":"a[2]":"a[3]}‘
12:34:56
 
echo $time | awk ‘{split($0,a,":" ); for (i=1; i<=3; i++) print a[i]}‘
12
34
56

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