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jneen/dynamic.js

Last active April 5, 2016 09:01
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Revisions

  1. Jeanine Adkisson revised this gist Apr 5, 2016. 1 changed file with 2 additions and 2 deletions.
    4 changes: 2 additions & 2 deletions dynamic.js
    View file
    Original file line number Diff line number Diff line change
    @@ -1,4 +1,4 @@
    function Dynamic() {
    var Dynamic = function() {
    var context = {}
    var defaults = {}

    @@ -63,4 +63,4 @@ function Dynamic() {
    setDefault: setDefault,
    remember: remember
    }
    }
    }();
  2. Jeanine Adkisson revised this gist Apr 5, 2016. 1 changed file with 6 additions and 1 deletion.
    7 changes: 6 additions & 1 deletion dynamic.js
    View file
    Original file line number Diff line number Diff line change
    @@ -16,7 +16,12 @@ function Dynamic() {
    }

    function get(name) {
    return context[name];
    if (typeof context[name] === 'undefined') {
    return defaults[name];
    }
    else {
    return context[name];
    }
    }

    function setDefault(name, val) {
  3. Jeanine Adkisson created this gist Apr 5, 2016.
    61 changes: 61 additions & 0 deletions dynamic.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,61 @@
    function Dynamic() {
    var context = {}
    var defaults = {}

    function bind(name, val, fn) {
    try {
    var save = context[name];
    context[name] = val;
    var out = fn();
    }
    finally {
    context[name] = save;
    }

    return out;
    }

    function get(name) {
    return context[name];
    }

    function setDefault(name, val) {
    if (arguments.length > 1) defaults[name] = val;

    return defaults[name];
    }

    function contextCopy() {
    var out = {}

    for (var k in context) {
    if (!hasOwnProperty.call(context, k)) continue;
    out[k] = context[k];
    }

    return out;
    }

    function remember(fn) {
    var savedContext = contextCopy();
    return function() {
    try {
    var swap = context;
    context = savedContext;
    var out = fn.apply(null, arguments);
    }
    finally {
    context = swap;
    }

    return out;
    };
    }

    return {
    bind: bind,
    get: get,
    setDefault: setDefault,
    remember: remember
    }
    }