Add ParameterMap diff method

[Anders Markvardsen]

At the moment there is no method to help with understanding why two maps are different.

Add method to help with this.

(Note simply outputting the entire map for RHS and LHS I found useless when the maps are too big)

[Martyn Gigg]

We need to be careful of performance here as that method can already be quite slow for big maps. We could consider adding a separate method such as something like

const std::string diff(const ParameterMap & other)

that would print out a nicer representation of the differences and then could only be called once a quick check with == is done.

[Anders Markvardsen]

Added diff method to parametermap. re #10030

Changeset: ce7f743fd0b2de2f018162cf33f1521190801731

[Anders Markvardsen]

To tester:

There are several was you can test this.

1. One see unit test and code

2. e.g. follow the following steps in mantidplot

a) Set logging to debug

b) Load from AutoTestdata a LOQ dataset

c) Load the same data again but this time rename is to something different

d) Edit LOQ_Parameters.xml in instrument folder

e) Run LoadParameterFile against say the workspace created in c)

f) Run CheckWorkspacesMatch where ensure that CheckInstrument is ticked

You should see debug logging telling you about the difference between the maps

[Wenduo Zhou]

Merge remote-tracking branch 'origin/feature/10030_diff_param_map'

Full changeset: ​614962042a9ebc532a4a274dcdc19c46992a279e

[Stuart Campbell]

This ticket has been transferred to github issue ​10872