var i = 1
var pattern1 = ["apple", "pear", "orange", "carrot"]
var pattern2 = ["apple", "pear", "orange", "carrot"]
var currentPat = "pattern" + i
alert(currentPat)
The currentPat variable is returning the string pattern1, its not returning the array. What am i doing wrong?
You should have the patterns as 2 elements of an array and then you can use this:
var i = 1
var pattern = [];
pattern[1] = ["apple", "pear", "orange", "carrot"]
pattern[2] = ["apple", "pear", "orange", "carrot"]
var currentPat = pattern[i]
alert(currentPat)
If you can't change how the patterns are defined you could use eval("pattern"+i)
but this isn't recommended since it makes the code harder to read and could lead to some security problems if used with user input.
To use a variable property name, you need to access that via the square brackets syntax:
var i = 1 var pattern1 = ["apple", "pear", "orange", "carrot"] var pattern2 = ["apple", "pear", "orange", "carrot"] var currentPat = window["pattern" + i] console.log(currentPat)
Because both pattern1
and pattern2
are global variables in your example, they automatically become properties of the global object (which in a browser, is the window
object).
window.pattern1
does exactly the same as
var prop = "pattern1"
window[prop]
or as
window["pattern1"]
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