mirror of
https://gitee.com/johng/gf
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49 lines
1.6 KiB
Go
49 lines
1.6 KiB
Go
// Copyright 2019 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package empty
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import (
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"reflect"
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)
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// 判断给定的变量是否为空。
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// 整型为0, 布尔为false, slice/map长度为0, 其他为nil的情况，都为空。
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// 为空时返回true，否则返回false。
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func IsEmpty(value interface{}) bool {
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if value == nil {
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return true
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}
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// 优先通过断言来进行常用类型判断
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switch value := value.(type) {
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case int: return value == 0
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case int8: return value == 0
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case int16: return value == 0
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case int32: return value == 0
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case int64: return value == 0
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case uint: return value == 0
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case uint8: return value == 0
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case uint16: return value == 0
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case uint32: return value == 0
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case uint64: return value == 0
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case float32: return value == 0
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case float64: return value == 0
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case bool: return value == false
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case string: return value == ""
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case []byte: return len(value) == 0
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default:
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// 最后通过反射来判断
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rv := reflect.ValueOf(value)
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kind := rv.Kind()
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switch kind {
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case reflect.Map: fallthrough
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case reflect.Slice: fallthrough
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case reflect.Array:
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return rv.Len() == 0
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}
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}
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return false
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} |