Perl and Python influences in JavaScript

If you search the Mozilla Central /js/src/.
[Inspiration: a blog post by Ziyun Fei.]

Perl influences in ECMAScript 5

String (jsstr.cpp):

• String.prototype.match()
• String.prototype.replace()
• String.prototype.split()
• String.prototype.substr()

Array (jsarray.cpp):

• Array.prototype.join()
• Array.prototype.reverse()
• Array.prototype.sort()
• Array.prototype.push()
• Array.prototype.pop()
• Array.prototype.shift()
• Array.prototype.unshift()
• Array.prototype.splice()

RegExp (builtin/RegExp.cpp): generally Perl-inspired, one comment attests to that fact.

Python influences in ECMAScript 5

String (jsstr.cpp):

• String.prototype.concat()
• String.prototype.slice()
• String.prototype.match()

Array (jsarray.cpp):

• Array.prototype.concat()
• Array.prototype.slice()

ECMAScript 6

ECMAScript 6 was influenced by several languages. Examples:

• Arrow functions [1] and classes [2] were inspired by CoffeeScript.
• Generators [3] were inspired by Python.

References

1. ECMAScript 6: arrow functions and method definitions
2. ECMAScript 6: classes
3. Iterators and generators in ECMAScript 6

---