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    fast-json-stable-stringifypublic

    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.

    Build Status Coverage Status

    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
    

    license

    MIT

    install

    npm i fast-json-stable-stringify

    Downloadslast 7 days

    4,121,825

    version

    2.0.0

    license

    MIT

    repository

    github.com

    last publish

    collaborators

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