grails - ==〜 bool 运算符是做什么的？

Question

这个==~ bool(boolean) 运算符在下面的代码中做什么？

springcacheCacheManager.cacheNames.each { name ->
    if (cacheNamePatterns.any { name ==~ it }) {
        flushNamedCache(name)
    }
}

Answer 1

match operator执行正则表达式匹配:

def regex = "[A-Z]{2,}"

assert "wot" !=~ regex
assert "A" !=~ regex
assert "ABC" ==~ regex

在您的代码中，如果 cacheName与任何 cacheNamePatterns匹配，它将被刷新:

def cacheNames = ['html', 'res/images', 'res/js']

def cacheNamePatterns = ['res/.*']

def flushedCaches = []


cacheNames.each { name ->
    if (cacheNamePatterns.any { name ==~ it }) {
        flushedCaches << name
    }
}

assert flushedCaches == ['res/images', 'res/js']