Issue I have two tasks that are running in go routines. I am using errgroup. I am not sure how to use the errgroup.WithContext correctly. In the following code, task1 is returning the error and I would like to terminate
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Deadlock while using goroutines
Issue I have a program which does 2 things: Read log entries and create logEntry objects Process each logEntry instances Here, reading is done by separate goroutines and processing of all the read entries is done by a single goroutine.
Continue readingPopulating an array using Channels in a WaitGroup routine
Issue I want to populate an array of arrays inside a subroutine. I am trying to do this using a channel. I am learning go, so unclear if this is the right way, so please correct me if I am
Continue readinggolang: all goroutines are asleep – deadlock
Issue I want to print 1 to 100 use two goroutine: package main import ( "fmt" "sync" ) var my_chan chan int var wg sync.WaitGroup func worker() { for true { number := <-my_chan fmt.Println(number) number++ if number > 100
Continue readingBest way to wake 0-N sleeping goroutines at once
Issue I’m writing a program where I start N (N is a command-line argument) worker threads, and at any time 0 to N-1 of them can be waiting on another to update a variable. What’s the best way for the
Continue readingSimultaneous calls should fetch data only once
Issue I’m running in an unusual scenario where: an external tool calls multiple endpoints of my API at the same time, all endpoints rely on the same config file hosted somewhere on S3. That works but it’s fetching the same
Continue readingGoroutines deadlock recursive
Issue I have a DFS recursive function which gives me all possible routes in a directed graph. And I can’t precisely know when it finishes. func dfs(data map[int][]int, path []int) { datum := path[len(path)-1] value := data[datum] for i :=
Continue readingHow to implement the query function
Issue I try to develop a program that reads from multiple replicated databases simultaneously. It must accept the response that arrives first. So the tsk is to implement the query function. I tried select, but the program gives an error
Continue readingWhen will Go scheduler create a new M and P?
Issue Just learned golang GMP model, now I understand how goroutines, OS threads, and golang contexts/processors cooperate with each other. But I still don’t understand when will an M and P be created? For example, I have a test code
Continue readingcan I omit defer keyword in this case?
Issue go func() { defer wg.Done() for i := 0; i < n; i++ { ch <- i } }() go func() { for i := 0; i < n; i++ { ch <- i } wg.Done() }() Are these
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