一个跟正则有关的字符串匹配问题

最近在做项目，用到了正则表达式，以前没有咋用过，所以不太熟，不说废话，直接说例子，一段文字：fasjfdhasljfhasldfhalkfdhas javascript akjdfkafhjsak;fa http https sfja;skldfjas;dfjaskdjakjdas

第一种方法：

数据文件：

module.exports = {

"labels": {

"JavaScript": [ "JavaScript", /ES ?6/ ],

"HTTP": [ /http[^:]/],

"HTML": [ "HTML", "HTML5" ],

}

};

写匹配正则函数：

function label(article) {
var htmltext = article;
var labels = [];
for (var prop in objlabels) {
var count = 0;
var arrlabel = objlabels[prop];
var len = arrlabel.length;
for (var i = 0; i < len; i++) {
if(typeof(arrlabel[i]) != "string") {
pattern = arrlabel[i].source;
pattern = new RegExp(pattern,'gi');
console.log("处理过的pattern = " + pattern);
console.log("处理过的pattern类型" + typeof(pattern));
} else {
var pattern = new RegExp(arrlabel[i], 'gi');
console.log("正常pattern = " + pattern);
console.log("正常的pattern类型" + typeof(pattern));
}
var ret = htmltext.match(pattern);
if (ret) {
console.log("reg = "+ret);
count += ret.length;
}
}
}
}
}

第二种方法：

数据文件：

module.exports = {

"labels": {

"JavaScript": [ "JavaScript",  "ES ?6"],

"HTTP": ["http[^:]"],

"HTML": [ "HTML", "HTML5" ],

}

};

匹配正则函数：

function label(article) {
var htmltext = article;
var labels = [];
for (var prop in objlabels) {
var count = 0;
var arrlabel = objlabels[prop];
var len = arrlabel.length;
for (var i = 0; i < len; i++) {
var pattern = new RegExp(arrlabel[i], 'gi');
console.log("pattern = " + pattern);
console.log("pattern类型" + typeof(pattern));
var ret = htmltext.match(pattern);
if (ret) {
count += ret.length;
}
}
}
}

var pattern = RegExp(“http”,’gi’);

这个pattern是一个正则对象，所以第二种方法会比较好用，因为没有类型的转换，不用分析两种情况。

请多多鼓励^_^