From 575dc7c0184978f73c4327c5f27f1c41c090fa5a Mon Sep 17 00:00:00 2001 From: Kyle Mendes Date: Fri, 27 Oct 2017 16:09:35 -0400 Subject: Adding missing semicolons --- javascript.html.markdown | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index 85c8a52d..4ed8f849 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -103,7 +103,7 @@ false; // ... which works with more than just strings "1, 2, " + 3; // = "1, 2, 3" -"Hello " + ["world", "!"] // = "Hello world,!" +"Hello " + ["world", "!"]; // = "Hello world,!" // and are compared with < and > "a" < "b"; // = true @@ -222,7 +222,7 @@ while (true){ var input; do { input = getInput(); -} while (!isValid(input)) +} while (!isValid(input)); // The `for` loop is the same as C and Java: // initialization; continue condition; iteration. @@ -293,7 +293,7 @@ myFunction("foo"); // = "FOO" // automatic semicolon insertion. Watch out for this when using Allman style. function myFunction(){ return // <- semicolon automatically inserted here - {thisIsAn: 'object literal'} + {thisIsAn: 'object literal'}; } myFunction(); // = undefined @@ -388,7 +388,7 @@ myFunc(); // = undefined // through `this`, even if it wasn't attached when it was defined. var myOtherFunc = function(){ return this.myString.toUpperCase(); -} +}; myObj.myOtherFunc = myOtherFunc; myObj.myOtherFunc(); // = "HELLO WORLD!" @@ -397,7 +397,7 @@ myObj.myOtherFunc(); // = "HELLO WORLD!" var anotherFunc = function(s){ return this.myString + s; -} +}; anotherFunc.call(myObj, " And Hello Moon!"); // = "Hello World! And Hello Moon!" // The `apply` function is nearly identical, but takes an array for an argument @@ -420,7 +420,7 @@ boundFunc(" And Hello Saturn!"); // = "Hello World! And Hello Saturn!" // `bind` can also be used to partially apply (curry) a function. -var product = function(a, b){ return a * b; } +var product = function(a, b){ return a * b; }; var doubler = product.bind(this, 2); doubler(8); // = 16 @@ -430,11 +430,11 @@ doubler(8); // = 16 var MyConstructor = function(){ this.myNumber = 5; -} +}; myNewObj = new MyConstructor(); // = {myNumber: 5} myNewObj.myNumber; // = 5 -// Unlike most other popular object-oriented languages, JavaScript has no +// Unlike most other popular object-oriented languages, JavaScript has no // concept of 'instances' created from 'class' blueprints; instead, JavaScript // combines instantiation and inheritance into a single concept: a 'prototype'. @@ -451,7 +451,7 @@ var myObj = { var myPrototype = { meaningOfLife: 42, myFunc: function(){ - return this.myString.toLowerCase() + return this.myString.toLowerCase(); } }; @@ -515,7 +515,7 @@ MyConstructor.prototype = { }; var myNewObj2 = new MyConstructor(); myNewObj2.getMyNumber(); // = 5 -myNewObj2.myNumber = 6 +myNewObj2.myNumber = 6; myNewObj2.getMyNumber(); // = 6 // Built-in types like strings and numbers also have constructors that create @@ -540,7 +540,7 @@ if (new Number(0)){ // you can actually add functionality to a string, for instance. String.prototype.firstCharacter = function(){ return this.charAt(0); -} +}; "abc".firstCharacter(); // = "a" // This fact is often used in "polyfilling", which is implementing newer @@ -556,7 +556,7 @@ if (Object.create === undefined){ // don't overwrite it if it exists Constructor.prototype = proto; // then use it to create a new, appropriately-prototyped object return new Constructor(); - } + }; } ``` -- cgit v1.2.3 From cbb09c2df6fe9b373457c3b59380038e85f00e92 Mon Sep 17 00:00:00 2001 From: name Date: Tue, 31 Oct 2017 13:57:42 +0300 Subject: [javascript/en] Add several usefull functions to work with arrays --- javascript.html.markdown | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index 4ed8f849..75bdf1ad 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -180,6 +180,23 @@ myArray.length; // = 4 // Add/Modify at specific index myArray[3] = "Hello"; +// Add and remove element from front or back end of an array +myArray.unshift(3); // Add as the first element +someVar = myArray.shift(); // Remove first element and return it +myArray.push(3); // Add as the last element +someVar = myArray.pop(); // Remove last element and return it + +// Join all elements of an array with a string +var myArray0 = [32,false,"js",12,56,90]; +myArray0.join(";") // = "32;false;js;12;56;90" + +// Get subarray of elements from index 1 (include) to 4 (exclude) +myArray0.slice(1,4); // = [false,"js",12] + +// Remove 4 elements starting from index 2, and insert there strings +// "33","34" and "35"; return removed subarray +myArray0.splice(2,4,"33","34","35"); + // JavaScript's objects are equivalent to "dictionaries" or "maps" in other // languages: an unordered collection of key-value pairs. var myObj = {key1: "Hello", key2: "World"}; -- cgit v1.2.3 From aff623e234d8d0844a44ff5331d756ae539aa6d0 Mon Sep 17 00:00:00 2001 From: name Date: Mon, 13 Nov 2017 00:41:52 +0300 Subject: Comments improved --- javascript.html.markdown | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index 75bdf1ad..199c3c09 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -186,7 +186,7 @@ someVar = myArray.shift(); // Remove first element and return it myArray.push(3); // Add as the last element someVar = myArray.pop(); // Remove last element and return it -// Join all elements of an array with a string +// Join all elements of an array with semicolon var myArray0 = [32,false,"js",12,56,90]; myArray0.join(";") // = "32;false;js;12;56;90" @@ -194,8 +194,9 @@ myArray0.join(";") // = "32;false;js;12;56;90" myArray0.slice(1,4); // = [false,"js",12] // Remove 4 elements starting from index 2, and insert there strings -// "33","34" and "35"; return removed subarray -myArray0.splice(2,4,"33","34","35"); +// "hi","wr" and "ld"; return removed subarray +myArray0.splice(2,4,"hi","wr","ld"); // = ["js",12,56,90] +// myArray0 === [32,false,"hi","wr","ld"] // JavaScript's objects are equivalent to "dictionaries" or "maps" in other // languages: an unordered collection of key-value pairs. -- cgit v1.2.3 From c06af7a5ac4097b26113ea649893e57e405edefc Mon Sep 17 00:00:00 2001 From: Apoorv Choubey Date: Sun, 17 Dec 2017 15:56:42 +0530 Subject: Added a resource to read for Javascript --- javascript.html.markdown | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index 199c3c09..e7066291 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -607,6 +607,10 @@ some of the more complicated examples. [Javascript: The Right Way][10] is a guide intended to introduce new developers to JavaScript and help experienced developers learn more about its best practices. +[Javascript:Info][11] is a modern javascript tutorial covering the basics (core language and working with a browser) +as well as advanced topics with concise explanations. + + In addition to direct contributors to this article, some content is adapted from Louie Dinh's Python tutorial on this site, and the [JS Tutorial][7] on the Mozilla Developer Network. @@ -622,3 +626,4 @@ Mozilla Developer Network. [8]: http://eloquentjavascript.net/ [9]: http://watchandcode.com/courses/eloquent-javascript-the-annotated-version [10]: http://jstherightway.org/ +[11]: https://javascript.info/ -- cgit v1.2.3 From faca0e79445f90e51acc4c4345795de6ae69c9ab Mon Sep 17 00:00:00 2001 From: hra Date: Sun, 1 Jul 2018 15:05:02 -0700 Subject: add for/of to js --- javascript.html.markdown | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index 85c8a52d..f2dd08c8 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -248,6 +248,13 @@ for (var x in person){ description += person[x] + " "; } // description = 'Paul Ken 18 ' +// The for/of statement allows iteration over an iterator. +var myPets = ""; +var pets = ["cat", "dog", "hamster", "hedgehog"]; +for (var pet of pets){ + myPets += pet + " "; +} // myPets = 'cat dog hamster hedgehog ' + // && is logical and, || is logical or if (house.size == "big" && house.colour == "blue"){ house.contains = "bear"; -- cgit v1.2.3 From 2a3d19ef73cf273e5ab0b0a6d640172b47b6bb92 Mon Sep 17 00:00:00 2001 From: hra Date: Sun, 1 Jul 2018 15:10:13 -0700 Subject: add for/of to js (change description) --- javascript.html.markdown | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index f2dd08c8..35bcf988 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -248,7 +248,9 @@ for (var x in person){ description += person[x] + " "; } // description = 'Paul Ken 18 ' -// The for/of statement allows iteration over an iterator. +// The for/of statement allows iteration over iterable objects (including the built-in String, +// Array, e.g. the Array-like arguments or NodeList objects, TypedArray, Map and Set, +// and user-defined iterables). var myPets = ""; var pets = ["cat", "dog", "hamster", "hedgehog"]; for (var pet of pets){ -- cgit v1.2.3 From c2e2fca15ce0d0398b341f3e4e8e0fcbc9987a65 Mon Sep 17 00:00:00 2001 From: luc4leone Date: Mon, 2 Jul 2018 14:15:02 +0200 Subject: Delete broken link to Eloquent Javascript - The Annotated Version by Gordon Zhu --- javascript.html.markdown | 5 ----- 1 file changed, 5 deletions(-) (limited to 'javascript.html.markdown') diff --git a/javascript.html.markdown b/javascript.html.markdown index e7066291..52084e93 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -600,10 +600,6 @@ of the language. [Eloquent Javascript][8] by Marijn Haverbeke is an excellent JS book/ebook with attached terminal -[Eloquent Javascript - The Annotated Version][9] by Gordon Zhu is also a great -derivative of Eloquent Javascript with extra explanations and clarifications for -some of the more complicated examples. - [Javascript: The Right Way][10] is a guide intended to introduce new developers to JavaScript and help experienced developers learn more about its best practices. @@ -624,6 +620,5 @@ Mozilla Developer Network. [6]: http://www.amazon.com/gp/product/0596805527/ [7]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript [8]: http://eloquentjavascript.net/ -[9]: http://watchandcode.com/courses/eloquent-javascript-the-annotated-version [10]: http://jstherightway.org/ [11]: https://javascript.info/ -- cgit v1.2.3