Brief Programming languages have the notion of constants which means “variables that can not be mutated once declared and initialized”. Go also has almost the same meaning, but in a different context. To initialize a variable as a constant with a value of 10, we can do something like this: 1 const DISCOUNT = 10 In Go, constants mean “storing a literal to a variable”, this can be seen as a version of pattern matching in Erlang. ...
This post shares how you can run an old version of Go while still having your machine’s default Go - which is newer.
First, install CompileDaemon: 1 $ go get github.com/githubnemo/CompileDaemon && go install github.com/githubnemo/CompileDaemon Then, from the root of the project, create a Make file: 1 $ touch Makefile And add the below content: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 GOCMD ?= go GOBUILD = $(GOCMD) build GOCLEAN = $(GOCMD) clean GOTEST = $(GOCMD) test GOGET = $(GOCMD) get BINARY_NAME = project_name BINARY_UNIX = $(BINARY_NAME)_unix default: all all: test build build: $(GOBUILD) -o ../$(BINARY_NAME) -v -ldflags="-X main.VERSION=$(TAG)" test: $(GOTEST) -v ./... clean: $(GOCLEAN) rm -f $(BINARY_NAME) rm -f $(BINARY_UNIX) run: build ./$(BINARY_NAME) dev: CompileDaemon -build="$(GOBUILD) -o ../$(BINARY_NAME)" -command="../$(BINARY_NAME)" -color="true" -exclude-dir=.git -exclude=".#*" Finally, from the root of your project: ...