谷歌javascript電子表格

Question

我想讓功能，告訴我有多少個單詞包含少於3個字母。 例如，「明天會下雨，所以帶上你的雨傘」 在這句話中，只有「be」和「so」等於兩個。任何幫助，將不勝感激。

function (stri){ 

return ("less than 3 ").length; 

} 

（我的目標，如果它可以使用\ W（正則表達式）。）

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; 
} 

說明：它使用帶有全局標誌的正則表達式\b\w{1,2}\b來匹配字符串中一個或兩個字符的所有單詞。然後它使用該字符串上的匹配函數給出一個單詞數組。最後，獲取計數的長度屬性。

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.