object-match-statement

object-match-statement

Generates if one-liner, that returns true, if left object is subset of right object.

Usage

var Matcher = require('object-match-statement');

console.log(Matcher.build('obj', { a: 1, b: 1})); // -> 'obj.a === 1 && obj.b === 1'

API

Matcher.compile(object)

Returns compiled function, that acceps object and returns Boolean, indicates, that passed object is matching compiled pattern.

Matcher.build(prefix, object)

Returns one-line if for comparsion other objects agains object param. Prefix used to identify compared object inside generated if.

Mathcer.escape(id)

Returns escaped property accessor. For example for valid will be returned .valid, but for -invalid will be returned ["-invalid"].

Benchmarks

object-match-statement is using if for patterns, since inlining is not an option (we need to construct comparing statement by object fields and values).

                     simple object
     164,427,234 op/s » inline#simple_match
     101,336,062 op/s » inline#simple_mismatch
     100,053,487 op/s » if#simple_match
      75,304,293 op/s » if#simple_mismatch
      87,757,658 op/s » swtch#simple_match
      68,066,432 op/s » swtch#simple_mismatch
      89,974,169 op/s » recursive#simple_match
      22,123,933 op/s » recursive#simple_mismatch

                      complex object
     123,443,614 op/s » inline#complex_match
     123,150,712 op/s » inline#complex_mismatch
      87,888,269 op/s » oms#complex_match
      82,031,672 op/s » oms#complex_mismatch
      71,166,844 op/s » swtch#complex_match
      69,140,028 op/s » swtch#complex_mismatch
      79,993,904 op/s » recursive#complex_match
      21,916,098 op/s » recursive#complex_mismatch

License

MIT (c) Vsevolod Strukchinsky