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Added docs to Hash table. #78

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Merged
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Jul 14, 2015
Merged

Added docs to Hash table. #78

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48 changes: 45 additions & 3 deletions src/data-structures/hash-table.js
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Original file line number Diff line number Diff line change
Expand Up @@ -26,22 +26,42 @@
(function (exports) {
'use strict';

/**
* Constructs a Node to store data and next/prev nodes in Hash table.
*
* @public
* @constructor
* @param {Number|String} key Key of the node.
* @param {Number|String} data Data to be stored in hash table.
*/
exports.Node = function (key, data) {
this.key = key;
this.data = data;
this.next = undefined;
this.prev = undefined;
};

/**
* Construct a Hash table..
*
* @public
* @constructor
*/
exports.Hashtable = function () {
this.buckets = [];
// The higher the bucket count; less likely for collisions.
this.maxBucketCount = 100;
};

/*
Using simple non-crypto x->integer based hash.
*/
/**
* Simple non-crypto hash used to hash keys, which determines
* while bucket the value will be placed in.
* A javascript implementation of Java's 32bitint hash.
*
* @public
* @method
* @param {Number|String} val Key to be hashed.
*/
exports.Hashtable.prototype.hashCode = function (val) {
var i;
var hashCode = 0;
Expand All @@ -63,6 +83,14 @@
return hashCode;
};

/**
* Puts data into the table based on hashed key value.
*
* @public
* @method
* @param {Number|String} key Key for data.
* @param {Number|String} data Data to be stored in table.
*/
exports.Hashtable.prototype.put = function (key, data, hashCode) {
/*
Make collision testing easy with optional hashCode parameter.
Expand Down Expand Up @@ -104,6 +132,13 @@
newNode.prev = first;
};

/**
* Get's data from the table based on key.
*
* @public
* @method
* @param {Number|String} key Key for data to be retrieved.
*/
exports.Hashtable.prototype.get = function (key, hashCode) {
/*
Make collision testing easy with optional hashCode parameter.
Expand Down Expand Up @@ -143,6 +178,13 @@
}
};

/**
* Removes data from the table based on key.
*
* @public
* @method
* @param {Number|String} key Key of the data to be removed.
*/
exports.Hashtable.prototype.remove = function (key, hashCode) {
/*
Make collision testing easy with optional hashCode parameter.
Expand Down