Module object/where

where

• where<O>(spec: Partial<Record<keyof O, ObjPredBy<O>>>, obj: O): boolean
• where(spec: Record<string | number | symbol, ObjPred<string, any>>): (obj: any) => boolean

• Takes a spec object and a test object; returns true if the test satisfies the spec. Each of the spec's own properties must be a predicate function. Each predicate is applied to the value of the corresponding property of the test object. where returns true if all the predicates return true, false otherwise.

  example

   // pred :: Object -> Boolean
   var pred = where({
     a: isEqual('foo'),
     b: complement(isEqual('bar')),
     x: a => a > 10,
     y: a => a < 20
   });
  
   pred({a: 'foo', b: 'xxx', x: 11, y: 19}); //=> true
   pred({a: 'xxx', b: 'xxx', x: 11, y: 19}); //=> false
   pred({a: 'foo', b: 'bar', x: 11, y: 19}); //=> false
   pred({a: 'foo', b: 'xxx', x: 10, y: 19}); //=> false
   pred({a: 'foo', b: 'xxx', x: 11, y: 20}); //=> false
  

  Type parameters

  • O

  Parameters

  • spec: Partial<Record<keyof O, ObjPredBy<O>>>

  • obj: O

  Returns boolean

• Takes a spec object and a test object; returns true if the test satisfies the spec. Each of the spec's own properties must be a predicate function. Each predicate is applied to the value of the corresponding property of the test object. where returns true if all the predicates return true, false otherwise.

  example

   // pred :: Object -> Boolean
   var pred = where({
     a: isEqual('foo'),
     b: complement(isEqual('bar')),
     x: a => a > 10,
     y: a => a < 20
   });
  
   pred({a: 'foo', b: 'xxx', x: 11, y: 19}); //=> true
   pred({a: 'xxx', b: 'xxx', x: 11, y: 19}); //=> false
   pred({a: 'foo', b: 'bar', x: 11, y: 19}); //=> false
   pred({a: 'foo', b: 'xxx', x: 10, y: 19}); //=> false
   pred({a: 'foo', b: 'xxx', x: 11, y: 20}); //=> false
  

  Parameters

  • spec: Record<string | number | symbol, ObjPred<string, any>>

  Returns (obj: any) => boolean

  • • (obj: any): boolean

    • Parameters

      • obj: any

      Returns boolean