Associative arrays give you another way to store information.
Using associative arrays, you can call the array element you need using a string
rather than a number, which is often easier to remember. The downside is that
these aren't as useful in a loop because they do not use numbers as the index
value.
An associative array is defined in the same way as a normal
array except you use a string instead of an index.
So for example we want to use store a list of cars, rather than
using:
This can be very useful sometimes but is not as useful as a
regular array when trying to loop through each value with a "for loop" as this
type of array isnt based upon index numbers.
To access a value in this type of array you again use the
index, but this time the index is a string, say for example we wanted to
retrieve the value of sporty, we would use:
mysportycar=mycars["sporty"]
That will create a variable called mysportycar and its value will
be citreon saxo.
Associative arrays are basically objects, as you can
also use the following syntax to add an element to an associative
array:
name_of_associative_array.index=value
Where index is a
string, lets try to create our cars array using dot syntax:
Smashing, that works great and is easy to code, getting
the value using dot syntax is also very simple. Now lets try to retrieve the
value of sporty from our cars array using dot syntax:
mysportycar=mycars.sporty
So the dot syntax to retrieve
the value of an associative array is as follows: