[SYSTEMDS-295] Unexpected order when print !boolean

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: SystemDS 3.1
• Fix Version/s: SystemDS 2.2, SystemDS 3.0, SystemDS 3.1
• Component/s: APIs, Runtime
• Assignee: Unassigned
• Reporter: Jon Deron Eriksson
• Created: 09/Sep/15 23:22
• Updated: 15/Mar/23 19:13
• Resolved: 02/Sep/22 10:46

Description

If I print the 'not' of a boolean value using print(''+!booleanValue), the resulting output to the console happens later than would be expected. For example, consider the following DML:

b = TRUE
print(b)
print(''+b)
print('hello')

print(b)
print(''+!b)
print('goodbye')

This outputs the following:

TRUE
TRUE
hello
TRUE
goodbye
FALSE

I would expect the following:

TRUE
TRUE
hello
TRUE
FALSE
goodbye

This also happens for PyDML.