Comparison of programming languages (associative array): Difference between revisions

Revision as of 22:42, 26 July 2020

Revision as of 23:11, 26 July 2020

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In this example, the sallyNumber value will now contain the string "555-9999".

=====''Enumeration''=====

The keys in a map are ordered. Thus, when iterating overthrough it, a map object returns keys in order of insertion. The following demonstrates enumeration using a for-loop:

The keys in a map are ordered. Thus, when iterating over it, a map object returns keys in order of insertion. The following demonstrates enumeration using a for-loop:

<syntaxhighlight lang=JavaScript>

// loop through the collection and display each entry.

for(const [name, number] of phoneBook) {

console.log(`'Phone number for ${name} is ${number}`');

}

</syntaxhighlight>