This package utilises concurrency capabilities of Google's Go language to fetch stock market data from YahooFinance API.

When fetching 7 stock tickers ("aapl", "msft", "tsla", "amzn", "goog", "nflx", "meta") there was approximatedly 2.66x speedup, actual speedup will vary on the parallel capabilities of your machine.

$ go get -u github.com/MartinKratochvilProgramy/gofetch

Add this import line to the file you're working in:

import "github.com/MartinKratochvilProgramy/gofetch"

Define your tickers in a string array, ticker names should correspond to the names found on yahoo.finance.com. Function gofetch.FetchAsync() returns array of structs TickerInfo{ticker string, price float64}. To get the ticker name or price, use the GetTicker() or GetPrice() functions.

tickers := []string{"aapl", "msft", "tsla", "amzn", "goog", "nflx", "meta"}

info := gofetch.FetchAsync(tickers)

for _, item := range info {
    fmt.Println(item.GetTicker(), item.GetPrice())
}

The above code prints ticker names and previous day close prices into console:

meta 177.16
goog 97.1
aapl 155.33
msft 269.32
amzn 101.16
nflx 361.42
tsla 214.24

If you do not wish to load ticker information into an array of structs, use the gofetch.FetchPrevClose() which returns previous day close price for individual stock.

info := gofetch.FetchPrevClose("aapl")
fmt.Println(info.GetTicker(), info.GetPrice())

Returns:

aapl 155.33