Jscollection

Welcome to Powerful Javascript Collection

Jscollection is a powerful, easy searchable, easy enumerable javascript collection implements List, Stack, Queue, FixedQueue library for JavaScript and node.js.

Installation

npm install jscollection

Manipulating a collection is just easy

var myList = new List();
myList.add(item)               // Add an item in collection
myList.addRange(arrayOfItems)  // Add multiple items in collection
myList.insertAt(index, item);  // Insert an item at a given position
myList.removeAt(index);        // Remove an item from a given position also returns the deleted item
myList.remove(item)            // Remove an item from collection also returns the deleted item
myList.removeLast()            // Remove the last item from collection also returns the deleted item
myList.removeAt(index)         // Remove an item at specific index from collection also returns the deleted item
myList.first()                 // Get the first item from the collection
myList.last()                  // Get the last item from the collection
myList.count()                 // Get the size of the collection
myList.any()                   // Is there any items present in collection?
myList.avg()                   // Calculate average of values present in collection
myList.sum()                   // Calculate sum of values present in collection

Traverse the collection asynchronously

eachAsync(function(item,index,nextCallback){}) - traverse the collection and perform asynchronous operations for each
Example:
myDataList.eachAsync(function(item, index, next) {
   insertIntoMongoDb(item, function(){
        next();  
   });
});

Execute asyncronus functions one after another

List.exeAsync(function insertIntomongo(next){
        // Do operation in mongo
        next(dataReturnedFromMongo); // once you are done call next
}, function insertIntoRedis(next, dataReturnedFromMongo){
        // Do operation in redis
        next(dataReturnedFromRedis); // // once you are done call next
}, function onDone(next, dataReturnedFromRedis){
      // call the final callback here
});

Searching and Querying your Collection

select(selector function)        // Select items from collection
selectMulti(selector function)   // Select items from collections where selected item is a collection/array
where(selector function)         // Where condition in query
groupby(selector function)       // Groupby your logic in javascript 
orderByAsc(comparator function)  // Sort items Ascending order
orderByDesc(comparator function) // Sort items in descending order
unique()                         // Collect only unique items from collection
top(count)                       // Collect only top N items from collection
bottom(count)                    // Collect last N items from collection
range(fromIndex,toIndex)         // Collect all items within a range

Authors and Contributors

@somnathpanja (somnathpanja@gmail.com)

Support or Contact

Having trouble with Pages? Check out our documentation or report issue and we’ll help you sort it out.