https://stackoverflow.com › questions › 33040703

Having a .then( ..., defaultErrorHandler) common pattern could be nice, with a top level defined defaultErrorHandler function, and optionally have a const defaultErrorHandler = error => { ... } declared within a function scope as desired.

https://www.w3schools.com › JS › js_const.asp

Example. const car = {type:"Fiat", model:"500", color:"white"}; car = {type:"Volvo", model:"EX60", color:"red"}; // ERROR. Try it Yourself » Difference Between var, let and const .

https://developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Statements › const

The const declaration declares block-scoped local variables. The value of a constant can't be changed through reassignment using the assignment operator, but if a constant is an object, its properties can be added, updated, or removed.

https://stackoverflow.com › questions › 14401856

const is most useful with parameter passing. If you see const used on a prototype with pointers, you know it is safe to pass your array or struct because the function will not alter it. No const and it can. Look at the definition for such as strcpy() and you will see what I mean.

https://www.javascripttutorial.net › javascript-const

ES6 provides a new way of declaring a constant by using the const keyword. The const keyword creates a read-only reference to a value. By convention, the constant identifiers are in uppercase. Like the let keyword, the const keyword declares blocked-scope variables.

https://sebhastian.com › javascript-const

The const keyword is used to declare a variable that can’t be changed after its declaration. This keyword is short for constant (which means “doesn’t change”), and it’s used in a similar manner to the let and var keywords. You write the keyword, followed it up with a variable name, the assignment = operator, and the variable’s value:

https://www.learncpp.com › cpp-tutorial › const-class-objects-and-const-member-functions

A const member function is a member function that guarantees it will not modify the object or call any non-const member functions (as they may modify the object). Making print() a const member function is easy -- we simply append the const keyword to the function prototype, after the parameter list, but before the function body:

https://www.cuemath.com › calculus › constant-functions

A constant function is of the form f (x) = k, where 'k' is a constant. It has the same output even with different input values. Learn more about constant function by using examples and graphs.