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Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
In this core java training session, you will learn Collections – Lists, Sets. Topics covered in this session are:
• List – ArrayList, LinkedList
• Set – HashSet, LinkedHashSet, TreeSet
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
Collections Framework is a unified architecture for managing collections, Main Parts of Collections Framework
1. Interfaces :- Core interfaces defining common functionality exhibited by collections
2. Implementations :- Concrete classes of the core interfaces providing data structures
3. Operations :- Methods that perform various operations on collections
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
In this core java training session, you will learn Collections – Lists, Sets. Topics covered in this session are:
• List – ArrayList, LinkedList
• Set – HashSet, LinkedHashSet, TreeSet
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
In this core java training session, you will learn Collections. Topics covered in this session are:
• Recap of Arrays
• Introduction to Collections API
• Lists – ArrayList, Vector, LinkedList
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
To learn important concept of Collection and its handling plus its advantages and different class & child class of Collection and their implementations. Important interview questions of the collection.
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Interfaces
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Queue
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Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
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• Recap of Arrays
• Introduction to Collections API
• Lists – ArrayList, Vector, LinkedList
For more information about this course visit on this link: https://www.mindsmapped.com/courses/software-development/learn-java-fundamentals-hands-on-training-on-core-java-concepts/
To learn important concept of Collection and its handling plus its advantages and different class & child class of Collection and their implementations. Important interview questions of the collection.
Java Collections | Collections Framework in Java | Java Tutorial For Beginner...Edureka!
**** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ****
This Edureka tutorial on “Java Collections” will talk about the complete hierarchy of Collections Frameworks in Java. It will walk you through the various fundamentals of collections like Lists, Queue, Sets, Interfaces etc. Through this tutorial you will learn the following topics:
Java Collection Framework
Collection Framework Hierarchy
Interfaces
List
Queue
Set
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
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Also with some examples.
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De-mystifying Zero to One: Design Informed Techniques for Greenfield Innovati...
Standard template library
1. STANDARD TEMPLATE
LIBRARY
BY:
SUKRITI SINGH
A0523113081
BTBM/13/242
AMITY INSTITUTE OF BIOTECHNOLOGY
AMITY UNIVERSITY, NOIDA
Teacher Incharge:
Mr. Asit Dwivedi
2. Library
Classes
To help programmers be more productive,
C++ includes predefined classes in the form
of packages as part of the installation.
These are called ‘library classes.’
It offers many packages through its
libraries. Packages, in turn, provide
thousands of classes that provides tens of
thousands of methods for carrying out
diverse type of tasks.
3. STANDARD TEMPLATE LIBRARY
(STL)
T he C++ ST L (Standard Template Library) is a powerful set of C++ template
classes to provide general-purpose templatized classes and functions that
implement many popular and commonly used algorithms and data structures like
vectors, lists, queues, and stacks.
Standard Template Library (STL) stands for standard template library and is
basically a library of many useful containers or algorithms.
In layman terms , it basically is a class template with functions already created
making life easier as they need to be merely called to be used.
The STL achieves its results through the use of templates. This approach is very
powerful, delivering compile-time polymorphism that is often more efficient
than traditional run-time polymorphism. Modern C++ compilers are tuned to
minimize any abstraction penalty arising from heavy use of the STL.
4. The Standard Template Library was created as the first library of generic algorithms
and data structures, with four ideas in mind: generic programming, abstractness
without loss of efficiency, the Von Neumann computation model, and value semantics.
The package file in C++ is stored in “namespace std” (namespace groups different
identifiers in a named scope.), hence before using the library classes we need to call
this directive as
using namespace std;
Function Objects
Function Objects
Iterators
Algorithm Containers
6. Container is a way that stored data is organized in memory, for
example an array of elements.
Algorithms in the STL are procedures that are applied to
containers to process their data, for example search for an
element in an array, or sort an array.
Iterators are a generalization of the concept of pointers, they
point to elements in a container, for example you can
increment an iterator to point to the next element in an array.
7. • Algorithm
Sort, find, search, copy, …
• Containers
iterators
vector, list, map, hash_map, …
Each container has its own iterator types
8. Containers
A container
is a way to
store data,
either
built-in
data types
like int and
float, or
class
objects.
Generic
"off-the-shelf“
class
templates
for storing
collections
of data.
Containers
are used to
manage
collections
of objects
of a certain
kind.
There are
several
different
types of
containers
like deque,
list, vector,
map etc.
9. Kinds of
Containers
Sequence
• Store elements in linear sequence
• Vectors, Linked Lists, and derivatives
Adaptors
• Used to automatically arrange stored
data in a specific order. Uses trees
• Queue, Priority_Queue, Stack
Associative
• Special purpose containers created
from normal containers
• Hash, Map, Set, Multimap, Multiset
10. Sequence
Containers
Special purpose containers created from normal
containers.These containers store and retrieve data in a
sequential fashion.
A sequence container stores a set of elements in sequence, in
other words each element (except for the first and last one) is
preceded by one specific element and followed by another.
In an ordinary C++ array the size is fixed and can not change
during run-time, it is also tedious to insert or delete elements.
Advantage: quick random access
11.
12. Stores elements by
position
Each item in the list
has both a value and a
memory address
(pointer) that
identifies the next
item in the sequence
To access a specific
data value in the list,
one must start at the
first position (front)
and follow the
pointers from element
to element until data
item is located.
Basic Steps
to Work in
Sequence
Containers
13. vector
– dynamic array
(hold sequences in difference ways)
• Offers random but ‘direct’ access.
• Back insertion
• Should be your default choice, but choose wisely
• Compatible with C : &v[0] points to the first element
• Treated as an array with the capability of growing or shrinking
dynamically. The elements can be accessed in two ways:
i. using the overloaded operator ( )
ii. using the method at
• The first one is easier and faster to use, but it is not range checked.
• On the other hand, the method does range checking and throws
out_of_range exception if needed.
14. deque
– double-ended queue (usually array of arrays)
o Offers random access
o Back and Front insertion
o Slower than vectors
o No C - compatibility
o This is basically a double-ended queue.
o If we want to grow/shrink in a deque, we can do it at both the ends.
o It provides the same accessing efficiency as the vector but the allocation efficiency
comparable with a list.
15. list
– 'traditional' doubly linked list
Don't expect random access
You can insert anywhere though, Arrays are optimised for random access
but are inefficient when it comes to inserting and deleting elements in the
middle; so are the vector and deque.
For operations requiring intensive insertions and deletions, use a list, which
is very efficient for these operations (and is internally implemented as a
double-linked list).
With a list, you cannot have random access to the data and so the operator
is not overloaded.
16. Associative
Containers
• As the name suggest ‘Associate’ is linking it to
different nodes.
• Used to automatically arrange stored data in a
specific order. Uses trees.
• Tress provide and facilitates faster searching.
• An associative container is non-sequential but uses a
key to access elements.
• The keys, typically a number or a string, are used by
the container to arrange the stored elements in a
specific order
• for example in a dictionary the entries are ordered
alphabetically.
17. Comparison of Trees, Lists, Arrays
Trees : They are non-linear data structures, where a unique path exists to traverse(moving ahead or
accessing) a particular node. Binary trees can utmost have 2 nodes, read either as Pre,In or Post.
Node: It is a self referential data structure, which works on sending reference of its location to
link of sets or maps.
Link list: It is a serial collection of nodes. While this is a linear data structure.
Array is a serial memory allocation while lists having serial nodes have a reference to the memory
hence allocated randomly and linked to each other through references.
Non-linear data
structure engages
memory in non
sequential order.
Linear data structures
engages memory
linearly or in a
sequential order.
Hence, we can
conclude that
18.
19. Maps:
• Stores unique key/value pairs
• key is associated with only one value (One-to-One
Mapping).
• Rapid key-based lookup.
Sets:
• Store the elements along with a unique key.
• The values are irrelevant and we keep track of the
keys only
• Rapid lookup
Common Points:
• These two are interchangeable.
• No duplicates
• They provide an important functionality,
Maps
and
Sets
21. Multisets and Multimaps:
These are extended versions of a map and set espectively.
Multisets:
• Stores non-unique sets
• duplicates are allowed, Rapid lookup.
Multimaps:
• Stores non-unique key/value pairs
• one key may be associated with more than one value (One-to-Many Mapping)
• Duplicates are allowed
• Rapid key based lookup
22. Adapter
Containers
Also known as Derived
Containers.
Provide different ways to
access sequential &
associative containers.
They are implemented
using the containers seen
before
They do not provide
actual data structure
Container adapters do
not support iterators
The functions push and
pop are common to all
container adapters
component that adapts
(modifies) an existing
interface of a component
to expose a different one
suitable for some
purpose.
These containers restrict
how elements enter and
leave a sequence
23.
24. Stack
LIFO
Last-in-first-out
data
structure
They are
implemented
with vector,
list, and deque
(by default)
Allows access
at only one
end of the
sequence (top)
Adds objects
to container by
pushing the
object onto
the stack
Removes
objects from
container by
popping the
stack
25. Queue
FIFO
First in First
Out Data
Structure.
Implemented
with list and
deque (by
default).
Allows access
only at the
front and
rear of the
sequence.
Items enter
at the rear
and exit
from the
front.
Example:
waiting line
at a grocery
store.
26. Priority
Queue
• Insertions are done in a sorted order
• Deletions from front similar to a queue
• They are implemented with vector (by default) or deque
• The elements with the highest priority are removed first
• Operations are similar to those of a stack or queue
• Elements can enter the priority queue in any order
• Once in the container, a delete operation removes the largest (or
smallest) value
• Example: a filtering system that takes in elements and then releases
them in priority order
18 13
3 15
27. In mathematics and Algorithm
computer science, an
algorithm is a step-by-step
procedure.
It is a specific set of
instructions for carrying
out a procedure or solving
a problem
Usually with the
requirement that the
procedure terminate at
some point.
Specific algorithms
sometimes also go by the
name method, procedure,
or technique.
28. Algorithms typically take iterators as arguments
Container provides a way to access its elements using
iterators.
Algorithms act on containers.
Provide the means by which you will perform initialization, sorting
, searching , and transforming of the contents of containers.
29. Iterators
Iterators are generalised pointers and act as the glue
between containers and algorithms.
STL algorithms are written in terms of iterator
parameters, and STL containers provide iterators that can
be plugged into algorithms.
Generally, iterators point to a location within a container.
Iterators have a pointer-like syntax (in many cases,
iterators are indeed implemented as pointers internally).
30. Iterators are used to step
throug h the elements of
collections of objects.
These collections
may be containers or
subsets of containers.
Iterators are pointer-like entities
that are used to access individual
elements in a container.
Often they are used to move sequentially
from element to element, a process
called iterating through a container.
One can have multiple iterators
pointing to different or identical
elements in the container
31. Container Type of iterator supported
Sequence containers
vector random access
deque random access
list bidirectional
Associative containers
set bidirectional
multiset bidirectional
map bidirectional
multimap bidirectional
Container adapters
stack no iterators supported
queue no iterators supported
priority_queue
no iterators supported
Generic programming: is a style of computer programming in which algorithms are written in terms of to-be-specified-later types that are then instantiated when needed for specific types provided as parameters.