在这个Java 8的Map Reduce示例里,我们首先对所有价格应用 12% 的VAT,然后用 reduce() 方法计算总和。*/List costBeforeTax2= Arrays.asList(100, 200, 300, 400, 500);doublebill = costBeforeTax.stream().map((cost) -> cost + .12*cost).reduce((sum, cost) -> sum +cost).get(); System.ou...
此外,如果你喜欢阅读,那么记得看一下Java 8的lambdas,实用函数式编程这本书(Java 8 Lambdas, pragmatic functional programming),作者是Richard Warburton,或者也可以看看Manning的Java 8实战(Java 8 in Action),这本书虽然还没出版,但我猜线上有第一章的免费pdf。不过,在你开始忙其它事情之前,先回顾一下Java 8的...
IgnitePredicate<GridSqlElement> c){if(from ==null)returnfalse;if(frominstanceofGridSqlTable || frominstanceofGridSqlSubquery)returnc.apply(from);if(frominstanceofGridSqlJoin) {// Left and right.if(findTablesInFrom((GridSqlElement)from.child(0), c))returntrue;if(findTablesInFrom((GridSql...