I am trying to use a variable to select from an array:
This works:
var myarray = {bricks:3000, studs:500, shingles:400, tiles:700};
function One() {
alert(myarray.bricks);
}
But this does not work:
var myarray = {bricks:3000, studs:500, shingles:400, tiles:700};
var myvalue = "bricks"
function Two() {
alert(myarray.myvalue);
}
How do I do this properly? Here is a fiddle to show what I am trying to accomplish: https://jsfiddle.net/chrislascelles/xhmx7hgc/2/
Use the [] notation.
var myarray = {bricks:3000, studs:500, shingles:400, tiles:700};
function One() {
alert(myarray.bricks);
}
var myvalue = "bricks" //supplied here to make example work
function Two() {
alert(myarray[myvalue]);
}
The variable is not an array, it's an object.
To access an element from object using variables you should use Bracket Notation like bellow
alert(myarray[myvalue]);
The only thing you are lacking is the syntax. Here is how it works:
function Two() {
alert(myarray[myvalue]);
}
In javascript, it means the same thing to write these two:
var a = {};
a.foo = "hello";
a["bar"] = "world";
a.bar; // world;
a["foo"]; // hello;
