![]() ![]() So, you would setup a hasChanges boolean and set it to |= diff (a,b) and then |= dif(b,c) etc. Groovy> println result |= true // println result |= falseĬonsider a situation where you want to know if anything has changed on a variety of objects and if so notify some one of the changes. The equal-to operator never throws an exception. It returns the pure value true if the operands are equal to each other otherwise it returns the pure value false.The operator may appear as part of an equality expression. Groovy> println result // println result |= false Equal-To Operator The equal-to operator performs a comparison between its operands and returns a boolean value. Here a simplified example of this: groovy> boolean result Modulo operator is an arithmetical operator which is denoted by. If you are provided with two numbers, say A and B, A is the dividend and B is the divisor, A mod B is there a remainder of the division of A and B. In particular, when applied to a boolean variable "|=" will set it to TRUE the first time it encounters a truthy expression on the right side and will HOLD its TRUE value for all |= subsequent calls. Modulo or Remainder Operator returns the remainder of the two numbers after division. I was looking for an answer on what |= does in Groovy and although answers above are right on they did not help me understand a particular piece of code I was looking at. Side note: | is not called pipe, instead its called OR, pipe is shell terminology transfer one process out to next. Not Equal operator takes two operands: left operand and right operand as shown in the following. The symbols used for Not Equal operator is. where as A=!B means if B is true then A become false (and if B is false then A become true). In this tutorial, we will learn how to use the Not Equal Operator in Java, with examples. ~ is bitwise complement bits, 0 to 1 and 1 to 0 (Unary operator) but ~= not an operator.Īdditionally, ! Called Logical NOT Operator, but != Checks if the value of two operands are equal or not, if values are not equal then condition becomes true. > is bitwise operator in Java that is called Unsigned shiftīut >= not an operator in Java. This is the default implementation of equals() in the Object class, and the String class has overridden the default implementation. a.equals(b) has returned true, meaning the condition ab is satisfied. Please follow the String equals() documentation. >= Right shift AND assignment operator C >= 2 is same as C = C > 2Īlso Note: (for below points I wanted to add my answer) The String class has overridden the equals() method. &= Bitwise AND assignment operator C &= 2 is same as C = C & 2 ^= bitwise exclusive OR and assignment operator C ^= 2 is same as C = C ^ 2 |= bitwise inclusive OR and assignment operator C |= 2 is same as C = C | 2 I am writing table for bitwise operators:įollowing are valid:. ![]() But may be my answer help you more about |= kind of binary operators. And in this situation do not want displayed. The naming of variables, and in your example, methods is what is important. But I have prints like this: if I want to find a word - one in line is the application - ones entered the convent home. No, there is absolutely nothing wrong with using the operator in if.then.else statements. I want that line of output used in the case of the word. If it was false was it done anyway? This is a very common problem, which ends in the reader trying to find out what the return values of functions really mean.You have already got sufficient answer for your question. I want to find out for yourself one point, but I did not get. In this case you should think about the logic of isNotC() and if it could be replaced by a method isC() if it makes sense.įinally your example has another problem when it comes to readability which is even more serious than the question whether to use negation or not: Does the reader of the code really knows when doSomething() returns true and when false? Try to name them so you can often use them in simple conditions without negation. In this case, what really is worth thinking about is the naming of the functions or variables. Here you have to use some sort of negation to get the desired logic. If you have an else-block anyway you should not use the negation in the if-condition.Įxcept for composed-conditions like this: if(!isA() & isB() & !isNotC()) This mainly plays a role if you skip the else part. More readable can be: if(conditionA=false) in some cases. Or did you mean like 'RUNNING OK' String Then you should use contains () instead of equals (). One simple reason is that it can be a source of errors, because it is possible to overlook it. 177 1 12 1 Off topic but is it really ' OK' you want to use and not 'OK' Joakim Danielson at 7:32 'even though the state is Running and status is ok' - it can't be both at the same time. It is generally not a bad idea to avoid the !-operator if you have the choice. ![]()
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