Slack User Mention in GO
Match Slack user mentions in their raw form <@U01234ABC> as delivered by the Events API.
Try it in the GO tester →Pattern
regexGO
<@U[A-Z0-9]{8,}> (flags: g)Go (RE2) code
goGo
package main
import (
"fmt"
"regexp"
)
func main() {
re := regexp.MustCompile(`<@U[A-Z0-9]{8,}>`)
input := `cc <@U01234ABC> please review`
for _, match := range re.FindAllString(input, -1) {
fmt.Println(match)
}
}Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.
How the pattern works
Literal <@U prefix, then 8 or more uppercase alphanumeric characters (Slack's ID alphabet), closed by >. Matches user IDs regardless of legacy or modern length.
Examples
Input
cc <@U01234ABC> please reviewMatches
<@U01234ABC>
Input
pinged <@UABCDEF123GH> earlierMatches
<@UABCDEF123GH>
Input
no mentionsNo match
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