標籤：
簡述：
測試了一下js的Regex函數match
用來從一個字串裡挑出非0開頭的數字， 放入一個array裡， 之後join（‘,‘)之後輸出
知識點：
1. 用match函數， 提取一個字串當中所有的數字
reg中的g返回所有的匹配，如果不加g則返回第一個匹配的項
2. 若果沒有匹配，則返回一個null的list
代碼：
<!DOCTYPE html><html><head> <script type="text/javascript"> function getNumList() { var nums = document.getElementById("numbers").value; var reg = /[1-9][0-9]*/g; var numList = nums.match(reg); if (numList == null) { document.getElementById("result").innerHTML = "No legal number input"; } else { document.getElementById("result").innerHTML = numList.join(","); } } </script></head><body> <p>Get numbers</p> <input type="text" id="numbers" value="123" /> <input type="button" value="exec" onclick="getNumList()" /> <p>result: <span id="result"></span></p></body></html>
輸出：
[轉] javascript Regex提取數字使用
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