Regular Expressions 101

\s*a Unicode whitespace character, repeated any number of times

Group 1(.*?)

.*?any Unicode character (except for line terminators), repeated any number of times

\s+a Unicode whitespace character, repeated at least once

Group 2(https?://\S+)

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://the literal text ://

\S+any character that is not Unicode whitespace, repeated at least once

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\s*(.*?)\s+(https?://\S+)

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Elementary Algebra https://amzn.to/3S7yG0Y Pre-Algebra https://amzn.to/3TpW8HK Discrete Mathematical Structures https://amzn.to/3eBYogb Discrete Mathematics and its Applications https://amzn.to/3TvfThe Discrete and Combinatorial Mathematics https://amzn.to/3CELUfO