#统计字符串中每个字符出现的次数 以The quick brown fox jumps over the lazy dog为例 message='The quick brown fox jumps over the lazy dog' count={} for character in message: count.setdefault(character,0) count[character]=count[character]+1 print(count) 参考:<Python编程快速上手--
var str = "abdcadfasfdbadfafdasdfasyweroweurowqrewqrwqrebwqrewqrejwq;;"; // console.log(numInstring(str)); function numInstring(str) { var text = ""; //循环的套出每个字符出现的次数 str会慢慢的变短直到为空 while (str != "") { //先将字符打散 var newstr = st
如文件word.txt内容如下: what is you name? my name is zhang san. 要求统计word.txt中出现“is”的次数? 代码如下: PerWordMapper package com.hadoop.wordcount; import java.io.IOException; import java.util.StringTokenizer; import org.apache.hadoop.io.IntWritable; import org.apach
str = "xxx" result = {} for i in set(str):#set将字符串转为集合对象,用于去重,减少计算量 result[i] = str.count(i) print result 使用python是真的方便,不仅有非常好用的高级方法,也没有c或c++,java的稍显繁琐的格式