strict

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2023-12-01

Provides a stricter version of Lazy which throws an error when attempting to wrap null, undefined, or numeric or boolean values as a sequence.

Signature

Lazy.strict = function() { /*...*/ }

Lazy.strict = function strict() {
  function StrictLazy(source) {
if (source == null) {
  throw new Error("You cannot wrap null or undefined using Lazy.");
}

if (typeof source === "number" || typeof source === "boolean") {
  throw new Error("You cannot wrap primitive values using Lazy.");
}

return Lazy(source);
  };

  Lazy(Lazy).each(function(property, name) {
StrictLazy[name] = property;
  });

  return StrictLazy;
}

Name	Type(s)	Description
returns	Function	A stricter version of the Lazy helper function.

Examples

var Strict = Lazy.strict();

Strict()                  // throws
Strict(null)              // throws
Strict(true)              // throws
Strict(5)                 // throws
Strict([1, 2, 3])         // instanceof Lazy.ArrayLikeSequence
Strict({ foo: "bar" })    // instanceof Lazy.ObjectLikeSequence
Strict("hello, world!")   // instanceof Lazy.StringLikeSequence

// Let's also ensure the static functions are still there.
Strict.range(3)           // sequence: [0, 1, 2]
Strict.generate(Date.now) // instanceof Lazy.GeneratedSequence