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limbowandering limbowandering

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add shell solutions

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solution
- 0192.Word Frequency
  - Solution.sh
- 0193.Valid Phone Numbers
  - Solution.sh
- 0194.Transpose File
  - Solution.sh
- 0195.Tenth Line
  - Solution.sh

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`‎solution/0192.Word Frequency/Solution.sh‎`

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	`1`	`+#!/usr/bin/env bash`
	`2`	`+`
	`3`	`+# NF是当前行的field字段数;NR是正在处理的当前行数。`
	`4`	`+awk '{`
	`5`	`+ for(i=1;i<=NF;i++){`
	`6`	`+ res[$i]++`
	`7`	`+ }`
	`8`	`+}`
	`9`	`+END{`
	`10`	`+ for(k in res){`
	`11`	`+ print k,res[k]`
	`12`	`+ }`
	`13`	`+}' words.txt \| sort -nr -k2`
	`14`	`+`
	`15`	`+#or:`
	`16`	`+`
	`17`	`+cat words.txt \| tr -s ' ' '\n' \| sort \| uniq -c \| sort -r \| awk '{print 2ドル" "1ドル}'`

`‎solution/0193.Valid Phone Numbers/Solution.sh‎`

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	`1`	`+#!/usr/bin/env bash`
	`2`	`+`
	`3`	`+# -P : --perl-regexp`
	`4`	`+grep -P '^(\d{3}-\|\(\d{3}\) )\d{3}-\d{4}$' file.txt`
	`5`	`+`
	`6`	`+# or use sed`
	`7`	`+sed -n -E '/^([0-9]{3}-\|\([0-9]{3}\) )[0-9]{3}-[0-9]{4}$/p' file.txt`
	`8`	`+`
	`9`	`+# or use awk`
	`10`	`+awk '/^([0-9]{3}-\|\([0-9]{3}\) )[0-9]{3}-[0-9]{4}$/' file.txt`

`‎solution/0194.Transpose File/Solution.sh‎`

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	`1`	`+#!/usr/bin/env bash`
	`2`	`+`
	`3`	`+awk '`
	`4`	`+{`
	`5`	`+ for (i=1; i<=NF; i++) {`
	`6`	`+ if(NR == 1) {`
	`7`	`+ res[i] = re$i`
	`8`	`+ } else {`
	`9`	`+ res[i] = res[i]" "$i`
	`10`	`+ }`
	`11`	`+ }`
	`12`	`+}END {`
	`13`	`+ for (i=1;i<=NF;i++) {`
	`14`	`+ print res[i]`
	`15`	`+ }`
	`16`	`+}`
	`17`	`+' file.txt`

`‎solution/0195.Tenth Line/Solution.sh‎`

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	`1`	`+#!/usr/bin/env bash`
	`2`	`+`
	`3`	`+# tail -n: use -n +K to output starting with the Kth`
	`4`	`+tail -n +10 file.txt \| head -1`
	`5`	`+`
	`6`	`+# awk:`
	`7`	`+awk 'NR == 10' file.txt`
	`8`	`+`
	`9`	`+# sed:`
	`10`	`+sed -n 10p file.txt`

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