Regular Expressions 101

Explanation

Pro

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Negative Lookahead(?!\d+\})

\d+a digit, repeated at least once

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Negated Character Class[^{}]*

*matches any number of characters outside the set below:

{the literal { (123₁₀ / 173₈ / 7B₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

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.

25 tokens

\{(?!\d+\})[^{}]*\}

New

this is the test string {0} with correct placeholder {1}.{abc} {abc1def} {12 45}

this is the test string {0} with correct placeholder {1}.{abc} {abc1def} {12 45}