谷歌javascript电子表格

Question

我想让功能，告诉我有多少个单词包含少于3个字母。 例如，“明天会下雨，所以带上你的雨伞” 在这句话中，只有“be”和“so”等于两个。任何帮助，将不胜感激。

function (stri){ 

return ("less than 3 ").length; 

} 

（我的目标，如果它可以使用\ W（正则表达式）。）

Answer 1

如果使用lodash你可以做以下...

<script src="http://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script> 
<script> 

    // create a function to call with your string and the min size of the word 
    function countSmalls(s,min) { 

     // split by non word characters 
     return _.where(s.split(/\W/),function(v,i,l){ 

     // return true or false to satisfy the callback, all *truthy* values are added to the return value of _.where 
     return v && v.length < min; 
     }).length; 
    } 

    // create some text 
    var lorem = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet."; 

    // call your function 
    countSmalls(lorem,3); // 24 (words that are < 3 characters) 

</script> 

Answer 2

function countSmallWords(stringToTest){ 
    var smallWords = /\b\w{1,2}\b/g; 
    return stringToTest.match(smallWords).length; 
} 

说明：它使用带有全局标志的正则表达式\b\w{1,2}\b来匹配字符串中一个或两个字符的所有单词。然后它使用该字符串上的匹配函数给出一个单词数组。最后，获取计数的长度属性。

用法示例：

//Example 1: 
alert(countSmallWords("Tomorrow will be rain. So bring your umbrellas")); 
//alerts 2 

//Example 2: 
var smallWordCount = countSmallWords("Hello. What a nice day it is."); 
//smallWordCount == 3 

//Example 3: 
var smallWordCount = countSmallWords("Are there any small words in this sentence?"); 
console.log(smallWordCount); 
//Press F12 and you will see 1 in the browser console.