Question

我是regex的新手。我一直坚持这一点，无法找到解决这个问题的方法。

我在后端使用nodejs。有一个输出来清除正则表达式，

results: ["Comparing /path/uploads/vector-1474379968511.data with /path/x1.data.","  + Squared l2 distance between representations: 2.067",
"Comparing /path/uploads/vector-1474379968511.data with /path/x2.data.","  + Squared l2 distance between representations: 1.670",
"Comparing /path/uploads/vector-1474379968511.data with /path/x3.data.","  + Squared l2 distance between representations: 1.686",
"Comparing /path/uploads/vector-1474379968511.data with /path/x4.data.","  + Squared l2 distance between representations: 0.287"]

我需要所有x1.data，x2.data等的路径（＆＃34; /path/x1.data" ;,＆＃34; /path/x2.data"等）对于每个x1.data，x2.data，...都有一个相应的＆＃34;表示＆＃34;值。路径需要具有这些值。换句话说，我需要以下内容：

/path/x1.data =＆gt; 2.067

/path/x2.data =＆gt; 1.670

/path/x3.data =＆gt; 1.686

.................... =＆gt; ......

Answer 1

/^([^ ]+) => (\d+\.\d+)$/gm

＆＃34; g＆＃34; （全局）标志表示正则表达式可以匹配多次。＆＃34; m＆＃34; （multiline）标志表示匹配整个字符串的开头和结尾而不是^和$，它们匹配行的开头和结尾。

^行首
([^ ]+)匹配所有非空格字符，一次或多次。括号表示它将被捕获为自己的＆＃34;组＆＃34;供你以后使用。
=>文字文字
(\d+\.\d+)匹配一个或多个数字（0 - 9）。然后是一个文字点＆＃34;。＆＃34;。然后是一个或多个数字（0 - 9）。再次，它被捕获为自己的小组。
$行尾

Answer 2

＆＃13;

var input = ["Comparing /path/uploads/vector-1474379968511.data with /path/x1.data.", "  + Squared l2 distance between representations: 2.067",
             "Comparing /path/uploads/vector-1474379968511.data with /path/x2.data.", "  + Squared l2 distance between representations: 1.670",
             "Comparing /path/uploads/vector-1474379968511.data with /path/x3.data.", "  + Squared l2 distance between representations: 1.686",
             "Comparing /path/uploads/vector-1474379968511.data with /path/x4.data.", "  + Squared l2 distance between representations: 0.287"];

var output = {};
var findPath = / with (.*)\.$/, findValue = /(\d+\.\d+)$/;
var path, value;
for (var i = 0, l = input.length; i < l; i++) {
  path = input[i].match(findPath)[1];
  i++; // move to next item
  value = input[i].match(findValue)[1];
  output[path] = value; // store however you like
}

console.log(output);

＆＃13;

正则表达式匹配nodejs中的两个值

2 个答案: