Greasemonkey- 从搜索引擎结果页面中随机挑选单词

Question

我正在做一个小项目，但我似乎陷入了困境。希望你们中的一些伟大的人能够在这方面帮助我。

我试图找到一种简单而有效的方法来从搜索引擎结果页面中挑选出一个或多个随机单词。这是我坚持的部分。

挑选出来后，我会将单词存储在变量中。

搜索结果如下所示： http://i54.tinypic.com/34fllw1.png

谢谢提前。任何提示/帮助将不胜感激！

编辑：有没有办法我能够挑选出一串随机长度的连续单词？

Answer 1

Google 用于描述的类是 st，因此这里是 Dr.Molle 解决方案的改进：

//get the text
var text=document.querySelector(".st"),output=[];
//loop through the descriptions
for(var i=0;i<text.length;i++){
    //find the words
    var words=text[i].innerText.match(/\b([a-z]{3,})\b/gi);
    //push the array to the output variable
    output.push.apply(output,words);
}
//pick a word
var theWord=output[Math.floor(Math.random()*output.length)];
//now theWord has a randomly chosen word
alert(theWord);

并挑选几个词：

//change the 10 to the max number of words
var amount=Math.floor(Math.random()*10),theWords="";
    //get the text
var text=document.querySelector(".st"),output=[];
//loop through the descriptions
for(var i=0;i<text.length;i++){
    //find the words
    var words=text[i].innerText.match(/\b([a-z]{3,})\b/gi);
    //push the array to the output variable
    output.push.apply(output,words);
}
//pick a word
var theNumber=Math.floor(Math.random()*output.length);
//loops the code the number of times randomly chosen
for(var i=0;i<amount;i++){
    //add on to the string
    theWords+=(i==0?"":" ")+output[theNumber+i];
}
//now theWords has a random number of consecutive words
alert(theWords);

Ad@m

Answer 2

这是一个完整的 Greasemonkey 脚本，它仅从描述中获取任意数量的随机单词，并更好地处理各种 Google 搜索页面（它们会稍微更改 DOM，具体取决于页面的获取方式。）

// ==UserScript==
// @name            _RandomWord from results
// @include         http://www.google.com/*
// @require         http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js
// ==/UserScript==

function GrabRandomWords () {
    /*--- Google search results are wrapped in a list with the id "rso".
        Here, we want just the descriptions in the results, so we know
        that title and link tag tags can be excluded.
        (Alas, Google's search results pages vary quite a bit in the
        detailed structure of their HTML.)
    */
    var descriptText    = $("#rso li *:not(a,h1,h2,h3)").text ();

    //--- Split into words.  Change the "{1,}", if short words like "a" are to be excluded.
    var words           = descriptText.match (/\b(\w{1,})\b/g);

    //--- Pick 5 random words and store them in an array.
    if (words) {
        var ourRandWords    = [];
        for (var J = 0;  J < 5;  ++J)
            ourRandWords.push ( words[ Math.floor (words.length * Math.random() ) ] );

        alert (ourRandWords);
    }
}

//--- We must wait until page has fully loaded, because the results are usually Ajaxed in.
window.addEventListener ("load",
    function () {
        /*--- Page is "loaded", but results are still not in, still need a short delay.
            Note that listening for DOMSubtreeModified doesn't seem to work well.
        */
        setTimeout (function() { GrabRandomWords (); }, 666);
    },
    false
);

Answer 3

下面是一个适用于 google.com 的示例。

//get the text
var text=document.getElementById('rso').textContent;
  //find the words 
var words=text.match(/\b([a-z]{3,})\b/gi);
  //pick a word
alert(words[Math.floor(words.length*Math.random())]);

搜索结果列在 ID 为“rso”的元素中。
正则表达式匹配至少包含 3 个字符 az 的字符串