Regular Expressions 101

^start of line

Group 1([^_]+_){3}

{3}repeats the group contents below exactly 3 times:

Negated Character Class[^_]+

+matches at least one character outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group field(?<field>[^_]+)

Negated Character Class[^_]+

+matches at least one character outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

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

^([^_]+_){3}(?<field>[^_]+)_

Test String
New

k8s_jenkins_jenkins-16-mrlz4_tau-ops_eb099c1d-6d70-11ea-8ba8-001a4a160104_0
k8s_datadog-agent_datadog-agent-t4dlc_clusteradmin_dd5f238b-6a16-11ea-8ef9-566f4e1c0167_351
k8s_core-order-service_core-order-service-deployment-1-t9b29_fltc-ods-uit_b10cf94d-64b1-11ea-8ef9-566f4e1c0167_3513

Regular Expression

Test StringNew

Test String
New