$map[$key]=$value; // add a key-value pair
unset($map[$key]); // remove the value with the specified key
if(isset($map[$key])) // if the map contains the key
foreach($map as $key=>$value) // traverse the items in the map
$n=count($map); // returns the number of items in the map
Using standard array access method like these will always use
the default priority.
An item that doesn't specify a priority will receive the default
priority. The default priority is set during the instantiation
of a new TPriorityMap. If no custom default priority is specified,
the standard default priority of 10 is used.
Priorities with significant digits below precision will be rounded.
A priority may also be a numeric with decimals. This is set
during the instantiation of a new TPriorityMap.
The default is 8 decimal places for a priority. If a negative number
is used, rounding occurs into the integer space rather than in
the decimal space. See {@link round}.
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Open project: pradosoft/prado
Class Usage Examples
| Method | Description | |
|---|---|---|
| __construct ( $data = null, $readOnly = false, $defaultPriority = 10, $precision = 8 ) | Constructor. | |
| add ( $key, $value, $priority = null ) : numeric | Adds an item into the map. A third parameter may be used to set the priority of the item within the map. Priority is primarily used during when flattening the map into an array where order may be and important factor of the key-value pairs within the array. | |
| clear ( ) | Removes all items in the map. {@link remove} is called on all items. | |
| contains ( $key ) : boolean | ||
| copyFrom ( $data ) | Copies iterable data into the map. | |
| count ( ) : integer | Returns the number of items in the map. | |
| getCount ( ) : integer | ||
| getDefaultPriority ( ) : numeric | ||
| getIterator ( ) : Iterator | Returns an iterator for traversing the items in the map. | |
| getKeys ( ) : array | Returns the keys within the map ordered through the priority of each key-value pair | |
| getPrecision ( ) : integer | ||
| getPriorities ( ) : array | This returns a list of the priorities within this map, ordered lowest to highest. | |
| getPriorityCount ( $priority = null ) : integer | Gets the number of items at a priority within the map. | |
| getReadOnly ( ) : boolean | ||
| itemAt ( $key, $priority = false ) : mixed | Returns the item with the specified key. If a priority is specified, only items within that specific priority will be selected | |
| itemsAtPriority ( $priority = null ) : array | Gets all the items at a specific priority. | |
| mergeWith ( $data ) | Merges iterable data into the map. | |
| offsetExists ( $offset ) : boolean | Returns whether there is an element at the specified offset. | |
| offsetGet ( $offset ) : mixed | Returns the element at the specified offset. | |
| offsetSet ( $offset, $item ) | Sets the element at the specified offset. | |
| offsetUnset ( $offset ) | Unsets the element at the specified offset. | |
| priorityAt ( $key ) : numeric | Retutrns the priority of an item at a particular flattened index. | |
| priorityOf ( $item ) : numeric | Returns the priority of a particular item within the map. This searches the map for the item. | |
| remove ( $key, $priority = false ) : mixed | Removes an item from the map by its key. If no priority, or false, is specified then priority is irrelevant. If null is used as a parameter for priority, then the priority will be the default priority. If a priority is specified, or the default priority is specified, only key-value pairs in that priority will be affected. | |
| setPriorityAt ( $key, $priority = null ) : numeric | This changes an item's priority. Specify the item and the new priority. | |
| toArray ( ) : array | When the map is flattened into an array, the priorities are taken into account and elements of the map are ordered in the array according to their priority. | |
| toArrayAbovePriority ( $priority, $inclusive = true ) : array | Combines the map elements which have a priority above the parameter value | |
| toArrayBelowPriority ( $priority, $inclusive = false ) : array | Combines the map elements which have a priority below the parameter value |
| Method | Description | |
|---|---|---|
| flattenPriorities ( ) : array | This flattens the priority map into a flat array [0,. | |
| setDefaultPriority ( $value ) | This must be called internally or when instantiated. | |
| setPrecision ( $value ) | This must be called internally or when instantiated. | |
| setReadOnly ( $value ) | ||
| sortPriorities ( ) | Orders the priority list internally. |
| public __construct ( $data = null, $readOnly = false, $defaultPriority = 10, $precision = 8 ) |
| public add ( $key, $value, $priority = null ) : numeric | ||
| return | numeric | priority at which the pair was added |
| public clear ( ) |
| public copyFrom ( $data ) |
| protected flattenPriorities ( ) : array | ||
| return | array | array of items in the list in priority and index order |
| public getDefaultPriority ( ) : numeric | ||
| return | numeric | gets the default priority of inserted items without a specified priority |
| public getIterator ( ) : Iterator | ||
| return | Iterator | an iterator for traversing the items in the map. |
| public getPrecision ( ) : integer | ||
| return | integer | The precision of numeric priorities, defaults to 8 |
| public getPriorities ( ) : array | ||
| return | array | the array of priority numerics in decreasing priority order |
| public getPriorityCount ( $priority = null ) : integer | ||
| return | integer | the number of items in the map at the specified priority |
| public getReadOnly ( ) : boolean | ||
| return | boolean | whether this map is read-only or not. Defaults to false. |
| public itemsAtPriority ( $priority = null ) : array | ||
| return | array | all items at priority in index order, null if there are no items at that priority |
| public mergeWith ( $data ) |
| public offsetExists ( $offset ) : boolean | ||
| return | boolean | |
| public offsetSet ( $offset, $item ) |
| public offsetUnset ( $offset ) |
| public priorityAt ( $key ) : numeric | ||
| return | numeric | priority of the item in the map |
| public priorityOf ( $item ) : numeric | ||
| return | numeric | priority of the item in the map |
| protected setDefaultPriority ( $value ) |
| protected setPrecision ( $value ) |
| public setPriorityAt ( $key, $priority = null ) : numeric | ||
| return | numeric | old priority of the item |
| public toArrayAbovePriority ( $priority, $inclusive = true ) : array | ||
| return | array | the array of priorities keys with values of arrays of items that are above a specified priority. The priorities are sorted so important priorities, lower numerics, are first. |
| public toArrayBelowPriority ( $priority, $inclusive = false ) : array | ||
| return | array | the array of priorities keys with values of arrays of items that are below a specified priority. The priorities are sorted so important priorities, lower numerics, are first. |
