Typescript-从包含符号的文本中提取字符串[重复]

Question

原文

var serverData = "12345 - Hello How are you!"
var serverData_1 = "12 - Washington"
var otherData = "965 - FileData"

如何仅从这3个字符串中提取数字。这样我就可以得到：

var server1 = "12345" from var serverData
var server2 = "12" from var serverData_1
var server3 = "965" from var otherData

Answer 1

可以使用正则表达式。

实例

var serverData = "12345 - Hello How are you!"
var serverData_1 = "12 - Washington"
var otherData = "965 - FileData"

var server1 = /\d+/.exec(serverData)[0]; //result "12345"
var server2 = /\d+/.exec(serverData_1)[0]; //result "12"
var server3 = /\d+/.exec(otherData)[0]; //result "965"

Answer 2

如果你总是有 " - ", 你可以使用分割命令：

var server1 = serverData.split(" - ", 1);

Answer 3

您可以使用简单的正则表达式，如：

var serverData = "12345 - Hello How are you!";
var serverData_1 = "12 - Washington";
var otherData = "965 - FileData";


console.log(/\d+/.exec(serverData)[0]);
console.log(/\d+/.exec(serverData_1)[0]);
console.log(/\d+/.exec(otherData)[0]);