How should I practice Convert an Entry List to a Map?

Start by reading the full statement, solve the visible examples, then compare the pattern against related EPAM phone screen problems in FastPrep.

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Convert an Entry List to a Map

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Problem statement

Each string in entries has the form key=value.

Convert the list into key-value rows. When a key appears more than once, keep its last value. Return rows as [key, value], sorted by key in ascending lexicographic order.

Function

listToMap(entries: String[]) → String[][]

Examples

Example 1

entries = ["color=blue","size=large","color=green"]return = [["color","green"],["size","large"]]

The final color replaces the earlier value, and keys are sorted.

Example 2

entries = ["a=1"]return = [["a","1"]]

One entry produces one row.

Constraints

1 <= entries.length <= 10000.
Keys and values are nonempty lowercase alphanumeric strings.
Each entry contains exactly one =.

Source note: Author-written prompt excerpt retained for source fidelity.