Class HelperUtils

Assign value from source, if property is defined in init at same key, and when the types correspond. Otherwise init data prop stays untouched. It isnt possible to set any prop undefined that is defined by init obj. Recurses on nested objects. These only get recursed/overriden when the source also has them obviously. Optionally: Overrides top-level init null-values with any object from source. Otherwise null-refs count as undefined. Using that option will remove type-safety as being leveraged, since the override value may or may not comply to what was specified by the initTyped object/interface declaration.

Calculates the base of an exponential function given a range and number of steps.

Filter any input by mask object (recurses), results in mask return type. Input & Mask do not get mutated (output is clone of mask).

Number.toFixed returns a string, using this func avoids parsing back to number.