Leetcode's Shell Part 4 questions finishing

Some of the details of the shell are not very familiar with, borrowed a lot of other people's Things

1. Word Frequency This problem is simple, as long as can be sorted can be cat words.txt |tr-s "" \ n "sort | unique-c | Sort-r | awk ' {print $ ' $ ' 2. Valid Phone Numberscat file.txt | awk '/^\d{3}-\d{3}-\d{4}$/|/^\ ([0-9]{3}\) [0-9]{3}-[0-9]{4}$/' 3.Transpose Filecat file.txt| awk ' {
MAX_NF = NFmax_nr = NrFor (x=1;x<=max_nf;x++) {vector[x,nr]= $x;    }}end{For (x = 1;x <= max_nf;x++) {For (y = 1;y <= max_nr; y++) {printf ("%s", Vector[x,y])if (Y < MAX_NR)printf ("")        }if (x < MAX_NF)printf ("\ n")}}' 4.Tenth linecat File.txt|awk ' nr==10 '

Leetcode's Shell Part 4 questions finishing