Published on August 05, 2019
// The solution is to map your objects to the array of identifiers. note: This only works if the identifier is, or can be reduced to, a primative type. If you supply objects it will use object references which might not act as you expect. There is no IEquatable in JS either. // map objects to a list of identifier strings let areaNames = stagingBuild.workitems.map((x) => x.area) //distinct categories will be distinct! The set will check if the value already exists // A value in the Set may only occur once; it is unique in the Set's collection. const distinctCategories = [...new Set(areaNames)] // watch out becuase undefined and NaN can be stored in the Set. // And in the case of strings, casing is respected for uniqueness
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