append to map javascript
var myMap = {};
myMap[newKey] = newValue;
// ...
// Another method
var myMap = new Map()
myMap.set("key0","value")
// ...
myMap.has("key1"); // evaluates to false, assuming key1 wasn't setappend to map javascript
var myMap = {};
myMap[newKey] = newValue;
// ...
// Another method
var myMap = new Map()
myMap.set("key0","value")
// ...
myMap.has("key1"); // evaluates to false, assuming key1 wasn't setmap javascript
var numbers = [1, 4, 9];
var doubles = numbers.map(function(num) {
return num * 2;
});
// doubles is now [2, 8, 18]. numbers still [1, 4, 9]map and set in javascript
const map = new Map([
[1970, 'bell bottoms'],
[1980, 'leg warmers'],
[1990, 'flannel'],
])Copyright © 2021 Codeinu
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