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keep the javascript cheatsheet into one single file

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Stephane Moreau 2018-04-20 00:05:42 +01:00
parent 40ea7c3283
commit d5fc4fceb5
3 changed files with 45 additions and 53 deletions
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9
README.md
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@ -29,14 +29,7 @@ Feel free to browse each cheatsheet to learn new things and to keep them at hand
#### Functional #### Functional
<details> * [JavaScript](languages/javaScript.js)
<summary>JavaScript</summary>
* [Objects](languages/javascript/objects.js)
* [Arrays](languages/javascript/arrays.js)
</details>
</details> </details>

45
languages/javascript/arrays.js → languages/javascript.js
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@ -1,9 +1,52 @@
/* *******************************************************************************************
* GLOBAL OBJECTS > OBJECT
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
* ******************************************************************************************* */
// Global object: properties
Object.length // length is a property of a function object, and indicates how many arguments the function expects, i.e. the number of formal parameters. This number does not include the rest parameter. Has a value of 1.
Object.prototype // Represents the Object prototype object and allows to add new properties and methods to all objects of type Object.
// Methods of the Object constructor
Object.assign(target, ...sources) // Copies the values of all enumerable own properties from one or more source objects to a target object. method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object
Object.create(MyObject) // Creates a new object with the specified prototype object and properties. The object which should be the prototype of the newly-created object.
Object.defineProperty(obj, prop, descriptor) // Adds the named property described by a given descriptor to an object.
Object.defineProperties(obj, props) // Adds the named properties described by the given descriptors to an object.
Object.entries(obj) // Returns an array containing all of the [key, value] pairs of a given object's own enumerable string properties.
Object.freeze(obj) // Freezes an object: other code can't delete or change any properties.
Object.getOwnPropertyDescriptor(obj, prop) // Returns a property descriptor for a named property on an object.
Object.getOwnPropertyDescriptors(obj) // Returns an object containing all own property descriptors for an object.
Object.getOwnPropertyNames(obj) // Returns an array containing the names of all of the given object's own enumerable and non-enumerable properties.
Object.getOwnPropertySymbols(obj) // Returns an array of all symbol properties found directly upon a given object.
Object.getPrototypeOf(obj) // Returns the prototype of the specified object.
Object.is(value1, value2); // Compares if two values are the same value. Equates all NaN values (which differs from both Abstract Equality Comparison and Strict Equality Comparison).
Object.isExtensible(obj) // Determines if extending of an object is allowed.
Object.isFrozen(obj) // Determines if an object was frozen.
Object.isSealed(obj) // Determines if an object is sealed.
Object.keys(obj) // Returns an array containing the names of all of the given object's own enumerable string properties.
Object.preventExtensions(obj) // Prevents any extensions of an object.
Object.seal(obj) // Prevents other code from deleting properties of an object.
Object.setPrototypeOf(obj, prototype) // Sets the prototype (i.e., the internal [[Prototype]] property).
Object.values(obj) // Returns an array containing the values that correspond to all of a given object's own enumerable string properties.
// Object instances and Object prototype object (Object.prototype.property or Object.prototype.method())
// Properties
obj.constructor // Specifies the function that creates an object's prototype.
obj.__proto__ // Points to the object which was used as prototype when the object was instantiated.
// Methods
obj.hasOwnProperty(prop) // Returns a boolean indicating whether an object contains the specified property as a direct property of that object and not inherited through the prototype chain.
prototypeObj.isPrototypeOf(object) // Returns a boolean indicating whether the object this method is called upon is in the prototype chain of the specified object.
obj.propertyIsEnumerable(prop) // Returns a boolean indicating if the internal ECMAScript [[Enumerable]] attribute is set.
obj.toLocaleString() // Calls toString().
obj.toString() // Returns a string representation of the object.
object.valueOf() // Returns the primitive value of the specified object.
/* ******************************************************************************************* /* *******************************************************************************************
* GLOBAL OBJECTS > ARRAY * GLOBAL OBJECTS > ARRAY
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
* ******************************************************************************************* */ * ******************************************************************************************* */
// Global object: properties // Global object: properties
Array.length // Reflects the number of elements in an array. Array.length // Reflects the number of elements in an array.
Array.prototype // Represents the prototype for the Array constructor and allows to add new properties and methods to all Array objects. Array.prototype // Represents the prototype for the Array constructor and allows to add new properties and methods to all Array objects.

44
languages/javascript/objects.js
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@ -1,44 +0,0 @@
/* *******************************************************************************************
* GLOBAL OBJECTS > OBJECT
* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object
* ******************************************************************************************* */
// Global object: properties
Object.length // length is a property of a function object, and indicates how many arguments the function expects, i.e. the number of formal parameters. This number does not include the rest parameter. Has a value of 1.
Object.prototype // Represents the Object prototype object and allows to add new properties and methods to all objects of type Object.
// Methods of the Object constructor
Object.assign(target, ...sources) // Copies the values of all enumerable own properties from one or more source objects to a target object. method is used to copy the values of all enumerable own properties from one or more source objects to a target object. It will return the target object
Object.create(MyObject) // Creates a new object with the specified prototype object and properties. The object which should be the prototype of the newly-created object.
Object.defineProperty(obj, prop, descriptor) // Adds the named property described by a given descriptor to an object.
Object.defineProperties(obj, props) // Adds the named properties described by the given descriptors to an object.
Object.entries(obj) // Returns an array containing all of the [key, value] pairs of a given object's own enumerable string properties.
Object.freeze(obj) // Freezes an object: other code can't delete or change any properties.
Object.getOwnPropertyDescriptor(obj, prop) // Returns a property descriptor for a named property on an object.
Object.getOwnPropertyDescriptors(obj) // Returns an object containing all own property descriptors for an object.
Object.getOwnPropertyNames(obj) // Returns an array containing the names of all of the given object's own enumerable and non-enumerable properties.
Object.getOwnPropertySymbols(obj) // Returns an array of all symbol properties found directly upon a given object.
Object.getPrototypeOf(obj) // Returns the prototype of the specified object.
Object.is(value1, value2); // Compares if two values are the same value. Equates all NaN values (which differs from both Abstract Equality Comparison and Strict Equality Comparison).
Object.isExtensible(obj) // Determines if extending of an object is allowed.
Object.isFrozen(obj) // Determines if an object was frozen.
Object.isSealed(obj) // Determines if an object is sealed.
Object.keys(obj) // Returns an array containing the names of all of the given object's own enumerable string properties.
Object.preventExtensions(obj) // Prevents any extensions of an object.
Object.seal(obj) // Prevents other code from deleting properties of an object.
Object.setPrototypeOf(obj, prototype) // Sets the prototype (i.e., the internal [[Prototype]] property).
Object.values(obj) // Returns an array containing the values that correspond to all of a given object's own enumerable string properties.
// Object instances and Object prototype object (Object.prototype.property or Object.prototype.method())
// Properties
obj.constructor // Specifies the function that creates an object's prototype.
obj.__proto__ // Points to the object which was used as prototype when the object was instantiated.
// Methods
obj.hasOwnProperty(prop) // Returns a boolean indicating whether an object contains the specified property as a direct property of that object and not inherited through the prototype chain.
prototypeObj.isPrototypeOf(object) // Returns a boolean indicating whether the object this method is called upon is in the prototype chain of the specified object.
obj.propertyIsEnumerable(prop) // Returns a boolean indicating if the internal ECMAScript [[Enumerable]] attribute is set.
obj.toLocaleString() // Calls toString().
obj.toString() // Returns a string representation of the object.
object.valueOf() // Returns the primitive value of the specified object.