George Opritescu

Found here

• install go bootstrap: https://storage.googleapis.com/golang/go1.4-bootstrap-20161024.tar.gz
• build it ( note the directory it says at the end of installation), in my case:

Installed Go for darwin/amd64 in /Users/geo/bootstrapped-go

• clone go repo: https://go.googlesource.com/go
• check out the version you’re interested in, in my case go1.7.4
• go to src folder
• GOROOT_BOOTSTRAP=/Users/boostrapped-go ./make.bash
• add your Println statements where needed
• any time you modify something in stdlib, you need to recompile
• repeat until problem found

Had an issue when trying to react to a chunked response from a server. The onreadystatechange function was being called only at the end, and not for intermediate values. Found the answer here:

• turns out, you need to set the header X-Content-Type-Options to nosniff

Found a really interesting bit of info in this heroku article:

SET statement_timeout TO '30s';

Which would ensure your queries will be timed out after 30 seconds.

Found answer here

int32(time.Now().Unix())

Problem: unexported struct field was used in a goqu query. The field did not have an equivalent db column.

Solution: mark it like in JSON:

type someName struct {
  myVirtualField int `db:"-"`
}

TIL: in go, a switch cases don’t automatically fallthrough. So, this:

switch something {
  case 0:
  case 1:
    fmt.Println("handling both")
}

won’t work as intended. Instead it should be:

switch something {
  case 0:
    fallthrough
  case 1:
    fmt.Println("handling both")
}

Problem: want to debug a failing test, from a compiled binary containing a lot of other tests.

Solution:

• compile tests with go test -c
• run dlv: dlv exec ./my.test – -test.run SomePattern
• debug!

TIL: if you have a struct with unexported fields ( aka lowercase field names ), and you try to unmarshal it from another package, the result will be a struct with blank field names.

Comes in handy when you want a struct field to map to a db column, which may have a different name. For example, I have CreatedAt field, but in the db, it’s created_at:

type Agent struct {
	Name      string
	Config    string
	CreatedAt time.Time `db:"created_at"`
}