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FlashGuru's Array's Tutorial
Author: FlashGuru | Website: http://www.flashguru.co.uk |

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Implementation of arrays in a script:

Ok so imagine we want to print out all of the quotes from our array, but we dont know how many quotes we have placed in the array, luckily for us flash has many built in properties and methods for use with the array object, one of which is the property which tells us how many elements we have in our array.

To find out how many elements you have in your array we can use:

myarraylength=name_of_array.length

the above code will create a new variable called myarraylength and its value will be the number of elements in the array you specify(name_of_array).

In the case of our quotes array, we could use the following code to tell us how many elements are in the array:

trace(quotes.length)

The output window should display three(3) if you have used the code i have given you previously.

The length of the array is equal to the highest index in your array plus one. The highest index in our quotes array is two(2) therefore we have three elements in our array. Remember arrays in flash 5 are zero based.

Now we know how to use the length property of the array object, we can now print out all the values in our array, the script would be as follows:

for(z=0;ztrace(name_of_array[z])
}

So lets go through that code step by step.

We firstly create a temporary variable called z:

z=0

We then say loop the following code while the value of the variable z is less than the length of our array:

z

And then we say add one to the value of our variable z:

++z

So lets put this script into use, by printing out all the value of our quotes array:

for(z=0;ztrace(quotes[z])
}

The above code:

trace(quotes[z])

will loop three times, this is due to the fact that the length of our quotes array is three(3), each time the code loops it will print out the value of the current element:

quotes[z]

This is because we increment(add one) to the value of z each time the script loops.

So we should now know how to use arrays, how to create arrays and how to get values from arrays.

There is another type of arrays which i would like to tell you how to use, there isnt much too it but its nice to know about, so here goes:

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» Level Intermediate

Added: : 2001-02-26 Rating: 7.87 Votes: 75 Hits: 3686

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