util

Documentation

Index

• func IsEmptyValue(v interface{}) bool
• func IsNil(v interface{}) bool
• func ToFloat64(v interface{}) (float64, bool)
• func TruncateStr(s string, n int) string
• func TruncateStrWithEllipsis(s string, n int) string

Functions

func IsEmptyValue

func IsEmptyValue(v interface{}) bool

IsEmptyValue checks whether v is considered empty using reflect. Returns true for nil interface, and zero values of the underlying type (e.g. "", 0, false, empty slice/map).

func IsNil

func IsNil(v interface{}) bool

IsNil reports whether v is nil, covering both untyped nil (interface itself) and typed nil (e.g. (*T)(nil) wrapped in interface{}). Avoids direct interface{} == nil comparison .

func ToFloat64

func ToFloat64(v interface{}) (float64, bool)

ToFloat64 extracts a float64 from a value that may be float64 or json.Number. Returns (0, false) if the value is neither.

func TruncateStr

func TruncateStr(s string, n int) string

TruncateStr truncates s to at most n runes, safe for multi-byte (e.g. CJK) characters.

func TruncateStrWithEllipsis

func TruncateStrWithEllipsis(s string, n int) string

TruncateStrWithEllipsis truncates s to at most n runes (including "..." suffix).