How should I practice Interleave Two Strings?

Start by reading the full statement, solve the visible examples, then compare the pattern against related ZipRecruiter online assessment problems in FastPrep.

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FastPrep tags this as a ZipRecruiter online assessment coding practice problem when the problem catalog has that company and stage context.

Interleave Two Strings

ZipRecruiter● EasyNEW GRADOA

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Problem statement

You are given two strings, first and second. Build a result by taking one character from first, then one from second, and repeating.

The first result character comes from first. When one string is exhausted, append the remaining suffix of the other string.

Function

interleaveStrings(first: String, second: String) → String

Examples

Example 1

first = "aaaaa"second = "bbb"return = "abababaa"

The first six characters alternate, then the two unused characters from the first string are appended.

Example 2

first = ""second = "abc"return = "abc"

The first string is empty, so the complete second string is appended.

Constraints

0 <= first.length,second.length <= 100000
Both strings contain lowercase English letters.