build SNAPSHOT version ,Is the logic wrong?

[zhangwenhao2013]

def isReleaseBuild() { return VERSION_NAME.contains("SNAPSHOT") == false }

def isReleaseBuild() { return VERSION_NAME.contains("SNAPSHOT") }

[gsprdev]

No. If the version name has a "SNAPSHOT" suffix it is, by definition, not a "release" build.
def isReleaseBuild() { return VERSION_NAME.contains("SNAPSHOT") == false }
determines whether SNAPSHOT is absent from the version name. The logic is correct.