private-cloud/console/mini_poem/mem/map.js

/*
 * Created by Strawmanbobi
 * 2014-08-30
 */

function Map() {
    this.elements = [];

    this.size = function() {
        return this.elements.length;
    };

    this.isEmpty = function() {
        return (this.elements.length < 1);
    };

    this.clear = function() {
        this.elements = [];
    };

    this.put = function(_key, _value) {
        this.elements.push( {
            key : _key,
            value : _value
        });
    };

    this.remove = function(_key) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    this.elements.splice(i, 1);
                    return true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    };

    this.get = function(_key) {
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    return this.elements[i].value;
                }
            }
        } catch (e) {
            return null;
        }
    };

    this.set = function(_key, _value) {
        for(i = 0; i < this.elements.length; i++) {
            if (this.elements[i].key == _key) {
                this.elements[i].value = _value;
                return;
            }
        }
        this.elements.push({
            key : _key,
            value : _value
        });
    };

    this.element = function(_index) {
        if (_index < 0 || _index >= this.elements.length) {
            return null;
        }
        return this.elements[_index];
    };

    this.containsKey = function(_key) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].key == _key) {
                    bln = true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    };

    this.containsValue = function(_value) {
        var bln = false;
        try {
            for (i = 0; i < this.elements.length; i++) {
                if (this.elements[i].value == _value) {
                    bln = true;
                }
            }
        } catch (e) {
            bln = false;
        }
        return bln;
    };

    this.values = function() {
        var arr = [];
        for (i = 0; i < this.elements.length; i++) {
            arr.push(this.elements[i].value);
        }
        return arr;
    };

    this.keys = function() {
        var arr = [];
        for (i = 0; i < this.elements.length; i++) {
            arr.push(this.elements[i].key);
        }
        return arr;
    }
}

module.exports = Map;