To be short: firstBigDecimal.compareTo(secondBigDecimal) < 0 // “<” firstBigDecimal.compareTo(secondBigDecimal) > 0 // “>” firstBigDecimal.compareTo(secondBigDecimal) == 0 // “==” firstBigDecimal.compareTo(secondBigDecimal) >= 0 // “>=”
&& is new in C++11. int&& a means “a” is an r-value reference. && is normally only used to declare a parameter of a function. And it only takes a r-value expression. If you don’t know what an r-value is, the simple explanation is that it doesn’t have a memory address. E.g. the number 6, … Read more
It’s the “null coalescing operator”, added in php 7.0. The definition of how it works is: It returns its first operand if it exists and is not NULL; otherwise it returns its second operand. So it’s actually just isset() in a handy operator. Those two are equivalent1: $foo = $bar ?? ‘something’; $foo = isset($bar) … Read more