的Javascript：如何從字符串中提取多個號碼

Question

輸入：

「（紐約訊）美國股市指數期貨華爾街小幅反彈，週三，隨着期貨對於S &普500上漲0.34％，道瓊斯指數上漲0.12％，納斯達克100指數上漲0.51％，格林威治時間0921。「

輸出應該是所有數字的數組，包括浮點數。

有點類似thread但它只提取一個數字。

Answer 1

這應該這樣做：

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)); 

可以例如過濾掉無效的電話號碼55.55.55用下面的代碼：

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

Answer 2

這個正則表達式應該工作：

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

測試：

"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"]