codewars-013: Ease the StockBroker

2019独角兽企业重金招聘Python工程师标准>>>

https://www.codewars.com/kata/54de3257f565801d96001200/train/java

packages codewars;
import java.util.regex.*;
public class OrdersSummary{public static String balanceStatements(String lst){StringBuilder sb = new StringBuilder();int nb = 0;int b = 0;int s = 0;StringBuilder bad = new StringBuilder();String regex = "\\S+\\s(\\d+)\\s(\\d*\\.\\d+)\\s([BS])";Pattern p = Pattern.compile(regex);String[] arr = lst.split(",");for(String x : arr){x = x.trim();if("".equals(x)){continue;}Matcher m = p.matcher(x);if(m.find()){if("B".equals(m.group(3))){b += Math.round(Double.valueOf(m.group(1)) * Double.valueOf(m.group(2)));}else{s += Math.round(Double.valueOf(m.group(1)) * Double.valueOf(m.group(2)));}}else{nb++;bad.append(String.format("%s ;",x));}}if(nb != 0){bad.insert(0, String.format("; Badly formed %d: ",nb));}sb.append(String.format("Buy: %d Sell %d",b,s));sb.append(bad);return sb.toString();}
}

转载于:https://my.oschina.net/u/553266/blog/804522

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