Not only are you doing extra branching, but by having defaults at the usage site instead of defaults site you could have inconsistencies.
Instead, on construction of the this, you could have
this.data=_.merge(defaultData,incomingData)
and then access all the properties unconditionally.
(You could also only merge in properties that already exist in defaultData tree, and perform validation at this stage, creating a very predictable this)
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IMO it lends itself to patterns like:
Not only are you doing extra branching, but by having defaults at the usage site instead of defaults site you could have inconsistencies.
Instead, on construction of the
this, you could haveand then access all the properties unconditionally.
(You could also only merge in properties that already exist in
defaultDatatree, and perform validation at this stage, creating a very predictablethis)