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* Make jsunity hash function avoid recursion This guards against traversals of recursive data structures causing a stack overflow. This is crucial when using assertEqual with unknown inputs. * Update deps accepts: 1.3.4 -> 1.3.5 ansi_up: 2.0.2 -> 4.0.3 content-disposition: 0.5.2 -> 0.5.3 dedent: 0.6.0 -> 0.7.0 error-stack-parser: 1.3.6 -> 2.0.2 eslint: 2.13.1 -> 5.16.0 eslint-config-semistandard: 6.0.2 -> removed eslint-config-standard: 5.3.1 -> removed eslint-plugin-promise: 1.3.2 -> removed eslint-plugin-standard: 1.3.2 -> removed highlight.js: 9.12.0 -> 9.15.6 http-errors: 1.6.2 -> 1.7.2 iconv-lite: 0.4.19 -> 0.4.24 joi: 9.2.0 -> 14.3.1 joi-to-json-schema: 2.3.0 -> 4.0.1 js-yaml: 3.10.0 -> 3.13.1 marked: 0.3.9 -> 0.6.2 mime-types: 2.1.12 -> 2.1.22 mocha: 2.5.3 -> 6.1.3 qs: 6.5.1 -> 6.7.0 semver: 5.4.1 -> 6.0.0 statuses: 1.4.0 -> 1.5.0 timezone: 1.0.13 -> 1.0.22 type-is: 1.6.15 -> 1.6.16 underscore: 1.8.3 -> 1.9.1 * Inline eslint semistandard config The eslint standard config has become extremely opinionated and incompatible with the existing coding style. This subset matches the existing coding style most closely. In the future we should migrate to an autoformatter like prettier and avoid this problem altogether. * Linting * Fix mocha runner * New joi has additional property |
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| test | ||
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| index.js | ||
| package.json | ||
README.md
fast-json-stable-stringify
Deterministic JSON.stringify() - a faster version of @substack's json-stable-strigify without jsonify.
You can also pass in a custom comparison function.
example
var stringify = require('fast-json-stable-stringify');
var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
console.log(stringify(obj));
output:
{"a":3,"b":[{"x":4,"y":5,"z":6},7],"c":8}
methods
var stringify = require('fast-json-stable-stringify')
var str = stringify(obj, opts)
Return a deterministic stringified string str from the object obj.
options
cmp
If opts is given, you can supply an opts.cmp to have a custom comparison
function for object keys. Your function opts.cmp is called with these
parameters:
opts.cmp({ key: akey, value: avalue }, { key: bkey, value: bvalue })
For example, to sort on the object key names in reverse order you could write:
var stringify = require('fast-json-stable-stringify');
var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
var s = stringify(obj, function (a, b) {
return a.key < b.key ? 1 : -1;
});
console.log(s);
which results in the output string:
{"c":8,"b":[{"z":6,"y":5,"x":4},7],"a":3}
Or if you wanted to sort on the object values in reverse order, you could write:
var stringify = require('fast-json-stable-stringify');
var obj = { d: 6, c: 5, b: [{z:3,y:2,x:1},9], a: 10 };
var s = stringify(obj, function (a, b) {
return a.value < b.value ? 1 : -1;
});
console.log(s);
which outputs:
{"d":6,"c":5,"b":[{"z":3,"y":2,"x":1},9],"a":10}
cycles
Pass true in opts.cycles to stringify circular property as __cycle__ - the result will not be a valid JSON string in this case.
TypeError will be thrown in case of circular object without this option.
install
With npm do:
npm install fast-json-stable-stringify
benchmark
To run benchmark (requires Node.js 6+):
node benchmark
Results:
fast-json-stable-stringify x 17,189 ops/sec ±1.43% (83 runs sampled)
json-stable-stringify x 13,634 ops/sec ±1.39% (85 runs sampled)
fast-stable-stringify x 20,212 ops/sec ±1.20% (84 runs sampled)
faster-stable-stringify x 15,549 ops/sec ±1.12% (84 runs sampled)
The fastest is fast-stable-stringify