# Category:JavaScript

**JavaScript**

This

**programming language**may be used to instruct a computer to perform a task.

Garbage collected: | Yes |
---|---|

Parameter passing methods: | By value |

Type strength: | Weak |

Type expression: | Implicit |

Type checking: | Dynamic |

See Also: |

**JavaScript** is the name of Netscape Communications Corporation's implementation of the ECMAScript standard, a scripting language based on the concept of prototype-based programming. The language is best known for its use in websites (as client-side JavaScript), but is also used to enable scripting access to objects embedded in other applications.

Despite the name, JavaScript is only distantly related to the Java programming language, the main similarity being their common debt to the C syntax. Semantically, JavaScript syntax has far more in common with the Self programming language.

JavaScript is a registered trademark of Sun Microsystems, Inc. It was used under license for technology invented and implemented by Netscape Communications and current entities such as the Mozilla Foundation.

Major browsers have generally implemented the features of ECMASScript 5 (ES5), and have started to adopt elements of ES6. Updates to implementation of ES6 features are tabulated here: https://kangax.github.io/compat-table/es6/

Once largely confined to browser environments, and typically isolated from access to system resources, JavaScript (and particularly the cross-platform Node.js runtime environment) is now very widely used in server-side and application scripting environments, with full access to local file systems and other OS resources.

At the same time, mainly because of JavaScript's role in the web, there is a growing number of other languages which compile to JavaScript.

The inclusion of **tail-call optimisation** in the ES6 standard reflects increased interest in functional approaches to the composition of JavaScript code, expressed for example, in significant adoption of libraries like Underscore and Lodash. If ES6 tail-call optimisation is widely implemented by JavaScript engines (so far this has mainly been achieved only by Apple's Safari engine) it will make JavaScript a more efficient and more natural environment for coding in a functional idiom.

## Citations

- Wikipedia:Javascript
- Node.js Event-driven I/O server-side JavaScript environment based on V8
- npm – Node.js Package Manager Claims to be the largest ecosystem of open source libraries in the world
- OS X JavaScript for Applications JavaScript as an OS X scripting language – supported by the Safari debugger
- Other JavaScript shells List maintained by Mozilla
- List of languages that compile to JS maintained on Github by Jeremy Ashenas – author of CoffeeScript, Underscore and Backbone
- Functional JavaScript – Michael Fogus, O'Reilly 2013

## To do

## Subcategories

This category has the following 3 subcategories, out of 3 total.

### @

- JavaScript User (307 P)

## Pages in category "JavaScript"

The following 200 pages are in this category, out of 799 total.

(previous page) (next page)### D

### E

- Echo server
- Eertree
- Egyptian division
- Elementary cellular automaton
- Emirp primes
- Empty directory
- Empty program
- Empty string
- Enforced immutability
- Entropy
- Enumerations
- Environment variables
- Equilibrium index
- Esthetic numbers
- Ethiopian multiplication
- Euclidean rhythm
- Euler method
- Euler's sum of powers conjecture
- Evaluate binomial coefficients
- Even or odd
- Events
- Evolutionary algorithm
- Exactly three adjacent 3 in lists
- Exceptions
- Exceptions/Catch an exception thrown in a nested call
- Execute a Markov algorithm
- Execute a system command
- Execute Brain****
- Execute HQ9+
- Execute SNUSP
- Exponentiation operator
- Extensible prime generator
- Extract file extension

### F

- Factorial
- Factors of a Mersenne number
- Factors of an integer
- Fairshare between two and more
- Fast Fourier transform
- FASTA format
- Faulhaber's triangle
- Fibonacci n-step number sequences
- Fibonacci sequence
- Fibonacci word
- Fibonacci word/fractal
- File extension is in extensions list
- File input/output
- File modification time
- File size
- Filter
- Find common directory path
- Find first missing positive
- Find if a point is within a triangle
- Find limit of recursion
- Find minimum number of coins that make a given value
- Find palindromic numbers in both binary and ternary bases
- Find the intersection of two lines
- Find the last Sunday of each month
- Find the missing permutation
- Find words which contain the most consonants
- Find words which contains more than 3 e vowels
- Find words with alternating vowels and consonants
- Finite state machine
- First perfect square in base n with n unique digits
- First-class functions
- First-class functions/Use numbers analogously
- Five weekends
- Fivenum
- FizzBuzz
- Flatten a list
- Flipping bits game
- Flow-control structures
- Floyd's triangle
- Floyd-Warshall algorithm
- Forest fire
- Formatted numeric output
- Forward difference
- Four bit adder
- Four is magic
- Fractal tree
- Fractran
- Free polyominoes enumeration
- Function composition
- Function definition
- Function prototype
- Functional coverage tree
- Fusc sequence

### G

- Galton box animation
- Gamma function
- Gapful numbers
- Gaussian elimination
- General FizzBuzz
- Generate Chess960 starting position
- Generate lower case ASCII alphabet
- Generate random chess position
- Generate random numbers without repeating a value
- Generator/Exponential
- Generic swap
- Geometric algebra
- Gotchas
- Gray code
- Grayscale image
- Greatest common divisor
- Greatest element of a list
- Greatest subsequential sum
- Greyscale bars/Display
- Guess the number
- Guess the number/With feedback
- Guess the number/With feedback (player)

### H

- Hailstone sequence
- Hamming numbers
- Handle a signal
- Happy numbers
- Harshad or Niven series
- Hash from two arrays
- Hash join
- Haversine formula
- Hello world/Graphical
- Hello world/Line printer
- Hello world/Newbie
- Hello world/Newline omission
- Hello world/Standard error
- Hello world/Text
- Hello world/Web server
- Here document
- Heronian triangles
- Hex dump
- Hexapawn
- Higher-order functions
- Hilbert curve
- Hofstadter Figure-Figure sequences
- Hofstadter Q sequence
- Hofstadter-Conway $10,000 sequence
- Holidays related to Easter
- Horner's rule for polynomial evaluation
- Hostname
- HTTP
- HTTPS
- Huffman coding
- Humble numbers
- Hunt the Wumpus

### I

### K

- K-means++ clustering
- Kaprekar numbers
- Kernighans large earthquake problem
- Keyboard input/Keypress check
- Keyboard input/Obtain a Y or N response
- Keyboard macros
- Knapsack problem/0-1
- Knapsack problem/Bounded
- Knapsack problem/Unbounded
- Knight's tour
- Knuth shuffle
- Koch curve
- Kronecker product
- Kronecker product based fractals

### L

- Langton's ant
- Largest int from concatenated ints
- Last Friday of each month
- Last letter-first letter
- Law of cosines - triples
- Leap year
- Least common multiple
- Legendre prime counting function
- Length of an arc between two angles
- Leonardo numbers
- Letter frequency
- Levenshtein distance
- List comprehensions
- List rooted trees
- Literals/Integer
- Literals/String
- Logical operations