Hi Marvin, Awesome explanation. I have learnt alot things through your mail.once again you made my day.
Thank you On 12-Jan-2018 9:31 PM, "Marvin Renich" <m...@renich.org> wrote: > * pradam <pradam.programm...@gmail.com> [180112 01:45]: > > I'm Newbie to golang, > > Welcome to Go! Many newbies often use "golang" rather than "Go" as the > language name, and most old-timers usually ignore this incorrect usage, > but golang is an artifact of the web site's hostname, golang.org. Also, > using golang in web searches for Go language information can help make > the results more specific to the computer language rather than other > uses of "go". However, in normal conversation, it is correct to use > "Go" for the name of the language. > > A very good introduction to Go can be found at the Go Tour > «https://tour.golang.org/». > > > var m []int //array declaration > > First, m is a slice of int, not an array of int. An array is a type > that has a fixed number of elements. A slice is a view into an array > that can vary in size. An array would be declared with an explicit > size, as > > var a [3]int > > A very good explanation of slices and arrays can be found at > «https://blog.golang.org/go-slices-usage-and-internals». > > > m = {1,2,3,4,5,6,7} // this throws error > > The left side of the assignment above is an attempt to specify a > composite literal. The correct syntax is > > m = []int{1, 2, 3, 4, 5, 6, 7} > > In other words, you must specify both the literal's type, []int, and its > value, {1, 2, 3, 4, 5, 6, 7}. You could do the same for the array a > declared above (note the explicit size in the type; it must match the > size in the original declaration): > > a = [3]int{23, 29, 31} > > This is described in the language specification at > «https://golang.org/ref/spec#Composite_literals». > > The complete language spec is extremely short compared to the specs for > most other computer languages. Once you have completed the Go Tour and > have played with Go for a little bit, it is probably worth your time to > read the entire spec. > > > so I have declared an array which takes only int items, > > > > so I can append items to it with append function.: > > > > m = append(m, 1,2,3,4,5,6,7,8,9) > > > > but I want to insert items without using append function. > > Again, the above blog entry about slices should help you understand how > to use slices and arrays more effectively. The Go language is designed > to make it easier to reason about when memory is being allocated for a > new value than in dynamically typed languages such as Python or > JavaScript. Because of this, an explicit function call to append is > necessary when appending to a slice might need to allocate a larger > backing array. > > I hope this explanation and the above links help you to better > understand this terrific language! > > ...Marvin > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
