Golang : Null and nil value
Programmers coming from different programming languages to Golang might wonder how does one deal with NULL values. I put down these reminders below about NULL value for myself and maybe this can be useful to you as well.
Here you go :
Golang does not support NULL.
Nil is the equivalent of NULL in Golang.
All variables by default are initiated with the nil(zero) value.
Example usage of nil :
correctHash := sha1.New() fmt.Printf("%x \n", correctHash.Sum(nil))
Function returning nil will NOT compile,
// not OK func getName() string { return nil }
but returning nil to a pointer or reference (such as a struct) is ok and will compile.
type Person struct { name string } // OK func getName() *Person { return nil }
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+3.2k Detect if Google Analytics and Developer Media are loaded properly or not
+11.4k Elastic Search : Return all records (higher than default 10)
+11.1k Golang : 2 dimensional array example
+14.2k Golang : Get query string value on a POST request
+23.6k Golang : convert rune to integer value
+28.3k Golang : Login(Authenticate) with Facebook example
+5.3k Golang : Build new URL for named or registered route with Gorilla webtoolkit example
+19.8k Golang : How to read float value from standard input ?
+15.5k Golang : Gzip file example
+8.3k Golang : How to get ECDSA curve and parameters data?
+11.8k Golang : Convert(cast) uintptr to string example