Leetcode: Word Frequency
2015-05-10 21:50
190 查看
Question
Write a bash script to calculate the frequency of each word in a text file words.txt.For simplicity sake, you may assume:
words.txt contains only lowercase characters and space ’ ’ characters.
Each word must consist of lowercase characters only.
Words are separated by one or more whitespace characters.
For example, assume that words.txt has the following content:
the day is sunny the the
the sunny is is
Your script should output the following, sorted by descending frequency:
the 4
is 3
sunny 2
day 1
Note:
Don’t worry about handling ties, it is guaranteed that each word’s frequency count is unique.
My Solution
using array in awk is common to useawk ‘{for(i=1;i<=NF;i++){arr[$i] +=1;}} END{for(i in arr){print i,arr[i] | “sort -nr -k2”};}’ words.txt
If using pipeline,
awk ‘{for(i=1;i<=NF;i++){arr[$i] +=1;}} END{for(i in arr){print i,arr[i] }’ words.txt | sort -nr -k2
sort -r: in reverse order, -k2: sort in the second column
Other′s Solution
cat words.txt | tr -s ′ ′ ′\n′ | sort | uniq -c | sort -rn | awk ‘{print $2″ ″$1}’tr -s ′ ′ ′\n′: substitute ′\n′ for ′ ′
uniq -c: count the same one
相关文章推荐
- leetcode-shell-192. Word Frequency
- leetcode-192 Word Frequency
- 【题解】leetcode_Word Frequency
- [Leetcode] 192. Word Frequency
- [leetcode][bash] Word Frequency
- [Leetcode Shell]Word Frequency
- [Leetcode] Word Frequency的笔记
- Leetcode: Word Frequency (shell , awk)
- leetcode192. Word Frequency
- [leetcode]Word Frequency
- [LeetCode] Word Frequency 单词频率
- [LeetCode] Word Frequency 单词频率
- LeetCode 192 Word Frequency
- leetcode 192. Word Frequency
- leetcode—Populating Next Right Pointers in Each Node
- [Leetcode] Decode Ways (Java)
- leetcode第一刷_3Sum Closest
- leetcode(十四)Binary Tree Zigzag Level Order Traversal
- [Leetcode] Palindrome Partitioning
- [leetcode]Permutation Sequence