padding/enlargement improvements

[behinger]

• allow pad_value to be a function (e.g. mean)
• rename protected 'padding' word to enlarge

Helps to investigate #9, also padding=0 did not work prior

[codecov-commenter]

Codecov Report

Merging #12 (d8bfb3f) into master (b2f8b98) will decrease coverage by 0.66%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
- Coverage   90.83%   90.16%   -0.67%     
==========================================
  Files           4        4              
  Lines         120      122       +2     
==========================================
+ Hits          109      110       +1     
- Misses         11       12       +1     

Impacted Files	Coverage Δ
src/core-recipe.jl	85.29% <75.00%> (-1.07%)	⬇️

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[palday]

calling methods explicitly is a bit weird. What do you want to do here?

[behinger]

find out whether elarge_value is a function or not. This is what I googled how to find out whether a variable is callable or not. I guess, one could also check whether it is a Number, and else call the function. probably easier to understand

[palday]

Seems to be superseded by #20. If there is still something good here, then we need to merge master in this branch after #20 lands.

[SimonDanisch]

I don't think there is...If we want to use the mean for extrapolation, we'd need a new PR with a new extrapolator! ;)