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Move Hash modules into Hash.

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This commit is contained in:
John-David Dalton
2017-01-10 09:54:39 -08:00
parent 20befcdf84
commit 69cac05575
6 changed files with 74 additions and 121 deletions
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93
.internal/Hash.js
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@@ -1,17 +1,15 @@
import hashClear from './.internal/hashClear.js';
import hashDelete from './.internal/hashDelete.js';
import hashGet from './.internal/hashGet.js';
import hashHas from './.internal/hashHas.js';
import hashSet from './.internal/hashSet.js';
/** Used to stand-in for `undefined` hash values. */
const HASH_UNDEFINED = '__lodash_hash_undefined__';
/**
* Creates a hash object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
class Hash {
/**
* Creates a hash object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
constructor(entries) {
let index = -1;
const length = entries == null ? 0 : entries.length;
@@ -22,13 +20,70 @@ class Hash {
this.set(entry[0], entry[1]);
}
}
/**
* Removes all key-value entries from the hash.
*
* @memberOf Hash
*/
clear() {
this.__data__ = Object.create(null);
this.size = 0;
}
/**
* Removes `key` and its value from the hash.
*
* @memberOf Hash
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
delete(key) {
const result = this.has(key) && delete this.__data__[key];
this.size -= result ? 1 : 0;
return result;
}
/**
* Gets the hash value for `key`.
*
* @memberOf Hash
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
get(key) {
const data = this.__data__;
const result = data[key];
return result === HASH_UNDEFINED ? undefined : result;
}
/**
* Checks if a hash value for `key` exists.
*
* @memberOf Hash
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
has(key) {
const data = this.__data__;
return data[key] !== undefined;
}
/**
* Sets the hash `key` to `value`.
*
* @memberOf Hash
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the hash instance.
*/
set(key, value) {
const data = this.__data__;
this.size += this.has(key) ? 0 : 1;
data[key] = value === undefined ? HASH_UNDEFINED : value;
return this;
}
}
// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;
export default Hash;

15
.internal/hashClear.js
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@@ -1,15 +0,0 @@
import nativeCreate from './.internal/nativeCreate.js';
/**
* Removes all key-value entries from the hash.
*
* @private
* @name clear
* @memberOf Hash
*/
function hashClear() {
this.__data__ = nativeCreate ? nativeCreate(null) : {};
this.size = 0;
}
export default hashClear;

17
.internal/hashDelete.js
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@@ -1,17 +0,0 @@
/**
* Removes `key` and its value from the hash.
*
* @private
* @name delete
* @memberOf Hash
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function hashDelete(key) {
const result = this.has(key) && delete this.__data__[key];
this.size -= result ? 1 : 0;
return result;
}
export default hashDelete;

27
.internal/hashGet.js
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@@ -1,27 +0,0 @@
import nativeCreate from './.internal/nativeCreate.js';
/** Used to stand-in for `undefined` hash values. */
const HASH_UNDEFINED = '__lodash_hash_undefined__';
/** Used to check objects for own properties. */
const hasOwnProperty = Object.prototype.hasOwnProperty;
/**
* Gets the hash value for `key`.
*
* @private
* @name get
* @memberOf Hash
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function hashGet(key) {
const data = this.__data__;
if (nativeCreate) {
const result = data[key];
return result === HASH_UNDEFINED ? undefined : result;
}
return hasOwnProperty.call(data, key) ? data[key] : undefined;
}
export default hashGet;

20
.internal/hashHas.js
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@@ -1,20 +0,0 @@
import nativeCreate from './.internal/nativeCreate.js';
/** Used to check objects for own properties. */
const hasOwnProperty = Object.prototype.hasOwnProperty;
/**
* Checks if a hash value for `key` exists.
*
* @private
* @name has
* @memberOf Hash
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function hashHas(key) {
const data = this.__data__;
return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
}
export default hashHas;

23
.internal/hashSet.js
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@@ -1,23 +0,0 @@
import nativeCreate from './.internal/nativeCreate.js';
/** Used to stand-in for `undefined` hash values. */
const HASH_UNDEFINED = '__lodash_hash_undefined__';
/**
* Sets the hash `key` to `value`.
*
* @private
* @name set
* @memberOf Hash
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the hash instance.
*/
function hashSet(key, value) {
const data = this.__data__;
this.size += this.has(key) ? 0 : 1;
data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
return this;
}
export default hashSet;