- #GOLANG CONVERT MAC ADDRESS TO STRING HOW TO#
- #GOLANG CONVERT MAC ADDRESS TO STRING INSTALL#
- #GOLANG CONVERT MAC ADDRESS TO STRING CODE#
To resolve this problem, the more optimal solution is to read a file in small chunks. When the file size is enormous(huge), it doesn’t make sense to read an entire file into memory, especially if you are running low on RAM.
#GOLANG CONVERT MAC ADDRESS TO STRING HOW TO#
Until now, we learned how to load an entire file into memory and read the file. How to read a file in small chunks in Golang Then it reads the content of the file path passed from the command line. The flag.Parse() should be called before the program accesses any flag.
Thie String function returns the address of a string variable that stores the value of a flag. Then we have created the string flag named fpath with a default value test.txt and description file path to read from using a String function. In the first line, we have imported all the packages. Output ➜ hello go run hello.go -fpath=/Users/krunal/Desktop/code/go/src/hello/test.txt hello.goįptr := flag.String("fpath", "test.txt", "file path to read from")
#GOLANG CONVERT MAC ADDRESS TO STRING CODE#
Write the final code inside the hello.go that reads the file. The first argument is the flag’s name, the second argument is a default value, and the third argument is the short description of the flag. The flag package in Golang has a String function.
Using the flag, we can get a file path as input from a command line and then read its contents.īut first, let’s understand how the flag package works. ➜ hello Passing the file path as a command-line flag.Īnother way to solve the path problem is to pass a file path as a command-line flag. hello.goĭata, err := ioutil.ReadFile("/Users/krunal/Desktop/code/go/src/hello/test.txt") Now, in the above example, let’s write the above path and then filename and see the output. If you do not know what your current path is, then you can type the following command on your terminal. The correct way to do it is to pass an absolute file path in the Go program. Passing the file path as a command-line flag.There are two ways to solve this problem, In the case of the test.txt file, it is not found in the location from which the binary is run that is why the program complains that it cannot find the file it specified. A binary is independent of the source code that is why it can be run from any location.
#GOLANG CONVERT MAC ADDRESS TO STRING INSTALL#
What Go install does is that it creates the binary from a source code. The reason is that Go is a compiled language. We got this error: File reading error open /test.txt: no such file or directory.īecause there is no hello.go file in that directory. ➜ hello go run hello.goįile reading error open /test.txt: no such file or directory If the above code is run from any other location, for instance, try running the program from /home/krunal/hello.go, it will log the following error in the console. Then, we convert the data to a string and display the contents of the file. Then the program reads the file and returns a byte slice, which is stored in data. The Witcher will be also coming to Netflix.įirst, we have imported the required packages. hello.goįmt.Println("Contents of file:", string(data))Ĭontents of file: Tomorrow The Rise Of Skywalker Will Release in India.
Remember the hello.go file is in the same directory as the test.txt file. Func autoConvert_componentconfig_KubeletConfiguration_To_v1alpha1_KubeletConfiguration(in *componentconfig.KubeletConfiguration, out *KubeletConfiguration, s conversion.Okay, now write the following code inside the hello.go file.