的Javascript：如何从字符串中提取多个号码

Question

输入：

“（纽约讯）美国股市指数期货华尔街小幅反弹，周三，随着期货对于S &普500上涨0.34％，道琼斯指数上涨0.12％，纳斯达克100指数上涨0.51％，格林威治时间0921。“

输出应该是所有数字的数组，包括浮点数。

有点类似thread但它只提取一个数字。

Answer 1

这应该这样做：

var text = "NEW YORK (Reuters) U.S. stock index futures pointed to a slight rebound on Wall Street on Wednesday, with futures for the S&P 500 up 0.34 percent, Dow Jones futures up 0.12 percent and Nasdaq 100 futures up 0.51 percent at 0921 GMT."; 
console.log(text.match(/(\d[\d\.]*)/g)); 

可以例如过滤掉无效的电话号码55.55.55用下面的代码：

var numbers = []; 
text.replace(/(\d[\d\.]*)/g, function(x) { var n = Number(x); if (x == n) { numbers.push(x); } }) 

Answer 2

这个正则表达式应该工作：

/[-+]?[0-9]*\.?[0-9]+/g 

测试：

"NEW YORK (Reuters) U.S. stock index futures pointed to a slight rebound on Wall Street on Wednesday, with futures for the S&P 500 up 0.34 percent, Dow Jones futures up 0.12 percent and Nasdaq 100 futures up 0.51 percent at 0921 GMT.".match(/[-+]?[0-9]*\.?[0-9]+/g) 

返回此Array：

["500", "0.34", "0.12", "100", "0.51", "0921"]