为排好的序的字符串， 找出重复的行。
实现这样一个需求，在一个Editplus文档中，有很多行10位的数字，这些数字已经排好序了。
比如：
1234567890
1234567891
1234567892
1234534124
1234614124
4321412414
5636373573
有什么办法能方便的找出两行至少前7位相同的数字吗？
比如,上面的数字中，能够找出
1234567890
1234567891
1234567892
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title></title> <style type="text/css"> div{ float:left; } #divCenter{ padding-top:100px;margin:0 50px; } .txt{width:200px;height:200px;} #txtOldData{background-color:#A6CAF0;} #txtAnswer{background-color:#EBA9A6;} </style> <script type="text/javascript"> function test() { var arr = document.getElementById("txtOldData").value.replace(/ +/g, '').split("\n"); var tempStr = arr[0].substring(0, 7); var compareLen = 7, equalNum = 0; var answer = ""; for (var i = 1; i < arr.length; i++) { if (arr[i].substring(0, 7) == tempStr) { if (equalNum == 0) answer += arr[i - 1] + "\n"; answer += arr[i] + "\n"; equalNum++; } else { tempStr = arr[i].substring(0, 7); equalNum = 0; } } document.getElementById("txtAnswer").value = (answer); } </script> </head> <body> <div> 请输入数值：<br /> <textarea id="txtOldData" class="txt"> 1234567890 1234567891 1234567892 1234534124 1234614124 4321412414 5636373573 </textarea> </div> <div style="padding-top:90px;padding" > <input type="button" value="测试==>" οnclick="test()" /> </div> <div> 结果：<br /> <textarea id="txtAnswer" class="txt"></textarea> </div> </body> </html>
比如：
1234567890
1234567891
1234567892
1234534124
1234614124
4321412414
5636373573
有什么办法能方便的找出两行至少前7位相同的数字吗？
比如,上面的数字中，能够找出
1234567890
1234567891
1234567892
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title></title> <style type="text/css"> div{ float:left; } #divCenter{ padding-top:100px;margin:0 50px; } .txt{width:200px;height:200px;} #txtOldData{background-color:#A6CAF0;} #txtAnswer{background-color:#EBA9A6;} </style> <script type="text/javascript"> function test() { var arr = document.getElementById("txtOldData").value.replace(/ +/g, '').split("\n"); var tempStr = arr[0].substring(0, 7); var compareLen = 7, equalNum = 0; var answer = ""; for (var i = 1; i < arr.length; i++) { if (arr[i].substring(0, 7) == tempStr) { if (equalNum == 0) answer += arr[i - 1] + "\n"; answer += arr[i] + "\n"; equalNum++; } else { tempStr = arr[i].substring(0, 7); equalNum = 0; } } document.getElementById("txtAnswer").value = (answer); } </script> </head> <body> <div> 请输入数值：<br /> <textarea id="txtOldData" class="txt"> 1234567890 1234567891 1234567892 1234534124 1234614124 4321412414 5636373573 </textarea> </div> <div style="padding-top:90px;padding" > <input type="button" value="测试==>" οnclick="test()" /> </div> <div> 结果：<br /> <textarea id="txtAnswer" class="txt"></textarea> </div> </body> </html>