simple absolute value, multiplication and subtraction are not readable? lolz

Search in the youtube. There are several funny things about this one.

I have thought for hours about this. On several occasions.
Can you give me some hint what trick might be hidden there?

This is not best practice at all, it's not readable what so ever. This should not be done in a professional environment.

Congrats!

7 January 2024 (180 lines)
This kata is great. I have devoted for this challenge about full 20 days.
My time is 10644.66ms. I know that it is too much, but .... so many attempts were done during these days.

what if the contents of the list have many elements? like 10 or 20?
not the best practices.

👍

its important to prepare for 4th dimensional objects incase physics changes in the future

Very clever solution.

Input for failing test cases is not "+". The error means that at some point, your oslution attempts to parse the string "+" as a number.

Your solution crashes for following inputs:

Input expression: 12*-1
For input string: "+"
Stack Trace
java.lang.NumberFormatException: For input string: "+"
	at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054)
	at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
	at java.base/java.lang.Double.parseDouble(Double.java:651)
	at MathEvaluator.getNumberOnTheRight(MathEvaluator.java:91)
	at MathEvaluator.calculates(MathEvaluator.java:72)
	at MathEvaluator.calculate(MathEvaluator.java:30)
	at TestSuite$MathEvaluatorTest.test(TestSuite.java:57)
  [...]

Input expression: 12* 123/-(-5 + 2)
For input string: "-"
Stack Trace
java.lang.NumberFormatException: For input string: "-"
	at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054)
	at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
	at java.base/java.lang.Double.parseDouble(Double.java:651)
	at MathEvaluator.getNumberOnTheRight(MathEvaluator.java:91)
	at MathEvaluator.calculates(MathEvaluator.java:72)
	at MathEvaluator.calculate(MathEvaluator.java:30)
	at TestSuite$MathEvaluatorTest.test(TestSuite.java:57)
  [...]

Input expression: (123.45*(678.90 / (-2.5+ 11.5)-(((80 -(19))) *33.25)) / 20) - (123.45*(678.90 / (-2.5+ 11.5)-(((80 -(19))) *33.25)) / 20) + (13 - 2)/ -(-11) 
For input string: "-"
Stack Trace
java.lang.NumberFormatException: For input string: "-"
	at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054)
	at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
	at java.base/java.lang.Double.parseDouble(Double.java:651)
	at MathEvaluator.getNumberOnTheRight(MathEvaluator.java:91)
	at MathEvaluator.calculates(MathEvaluator.java:72)
	at MathEvaluator.calculate(MathEvaluator.java:30)
	at TestSuite$MathEvaluatorTest.test(TestSuite.java:57)
  [...]
  
Input expression: 12 * -123
For input string: "+"
Stack Trace
java.lang.NumberFormatException: For input string: "+"
	at java.base/jdk.internal.math.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2054)
	at java.base/jdk.internal.math.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
	at java.base/java.lang.Double.parseDouble(Double.java:651)
	at MathEvaluator.getNumberOnTheRight(MathEvaluator.java:91)
	at MathEvaluator.calculates(MathEvaluator.java:72)
	at MathEvaluator.calculate(MathEvaluator.java:30)
	at TestSuite$MathEvaluatorTest.test(TestSuite.java:57)
	[...]

All stacktraces seem to originate from MathEvaluator.getNumberOnTheRight(MathEvaluator.java:91), so you need to search for error in your solution somewhere around there.

Hello.

I use the Java language.

The tests pass, but when I try to send the code, writes: "For input string:"+"." Then follows Stacktrace, in which: "Java.lang.numberformatexception: for input string:"+". Next, Stacktrace ...".

My calculator returns 0.0 with a transferred line "+". I don’t understand what needs to be returned to go these tests.

I think that the exception should be returned to such a line: "+". Since this is not a mathematical expression. I think the decision is the correctness of the exclusion. But I can’t fully understand in which form to return the exception.

Who can direct to the right thought, please write?

17 August 2023

Python

Not hard. Overestimated. It took me three evenings.

11 August 2023. Python. Three weeks. Thinking, drawing and reading.

1000 - 77.03ms

All tests 7708.20ms - 9314.85ms

As I know, at first, possible errors, non-standard situations are written in the if block.