How to get an environment variable in Go?
In Go lang, how to get an environment variable?
To get an environment variable (e.g. “VAR”) in GO:
import "os"
import "fmt"
fmt.Println("VAR:", os.Getenv("VAR"))
Similar Posts
How to test a file or directory exists in Go?
ByEric MaHow to test a path (a file or directory exists) in golang? In Bash, the [ -e ] tests can test whether a file or a directory exist. What are the corresponding Go ways for the test? You can use the `os.Stat()` and `os.IsNotExist()` standard libraries functions together to test whether a file or a…
Rsync with non-standard ssh ports
ByEric MaThis problem appears when I try to rsync directories with hosts inside a cluster used NAT for forwarding ports to internal nodes. Hence, the ssh port for internal nodes are not the default 22. So, how to use rsync with the non-standard ssh ports? The -e options of rsync play the trick very well. For…
Simple and Basic Image Editor in Linux
ByEric MaWhich simple and basic image editors are good on Linux like the paint program on Windows? GIMP is great but too high weighted for normal usage like resizing, cropping, image annotation with text. Pinta is a free and open source drawing/editing program that is easy to edit images. It is available on many Linux distros….
How to use OpenVPN together with Ovpn Spider on iPhone?
ByEric MaBut.. how to use the OpenVPN together with Ovpn Spider on iPhone? You can check OpenVPN + Ovpn Spider: Free VPNs for iPhone Users. Read more: Free VPNs for iPhone Users: OpenVPN + Ovpn Spider How to use iPhone to browse blocked websites in mainland China? how to use pc internet of window8 on iphone…
Transactional memory learning materials
ByQ AI want to learn transactional memory technologies. Any suggestions on Transactional memory learning materials? Thanks! I highly suggest the Transactional Memory lecture by James R. Larus and Ravi Rajwar of Synthesis Lectures on Computer Architecture: The Transactional Memory lecture:http://www.morganclaypool.com/doi/abs/10.2200/S00070ED1V01Y200611CAC002 Link to the PDF:http://www.morganclaypool.com/doi/pdf/10.2200/S00070ED1V01Y200611CAC002 Read more: Mmaping Memory Range Larger Than the Total Size of Physical…
Crypto Futures vs. Perpetuals: Key Differences Explained
In the dynamic world of cryptocurrency trading, “futures” and “perpetuals” are two of the most popular instruments for speculators and hedgers. While often discussed together, they are distinct products with crucial differences. Both allow traders to bet on the future price of a cryptocurrency without actually owning it. [1][2] What are Crypto Futures? A crypto…