Here’s how to do it with the # and % operators in Bash. $ x=”/foo/fizzbuzz.bar” $ y=${x%.bar} $ echo ${y##*/} fizzbuzz ${x%.bar} could also be ${x%.*} to remove everything after a dot or ${x%%.*} to remove everything after the first dot. Example: $ x=”/foo/fizzbuzz.bar.quux” $ y=${x%.*} $ echo $y /foo/fizzbuzz.bar $ y=${x%%.*} $ echo $y … Read more
In Go 1.1 and newer the most simple way to do this is with a bufio.Scanner. Here is a simple example that reads lines from a file: package main import ( “bufio” “fmt” “log” “os” ) func main() { file, err := os.Open(“/path/to/file.txt”) if err != nil { log.Fatal(err) } defer file.Close() scanner := bufio.NewScanner(file) … Read more
Sprintf is what you are looking for. Example fmt.Sprintf(“foo: %s”, bar) You can also see it in use in the Errors example as part of “A Tour of Go.” return fmt.Sprintf(“at %v, %s”, e.When, e.What)
\r = CR (Carriage Return) → Used as a new line character in Mac OS before X \n = LF (Line Feed) → Used as a new line character in Unix/Mac OS X \r\n = CR + LF → Used as a new line character in Windows
There is no better way I know of. Bash knows only status codes (integers) and strings written to the stdout.
In Flutter, the Color class only accepts integers as parameters, or there is the possibility to use the named constructors fromARGB and fromRGBO. So we only need to convert the string #b74093 to an integer value. Also we need to respect that opacity always needs to be specified. 255 (full) opacity is represented by the … Read more
Heredoc sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat cat << EndOfMessage This is line 1. This is line 2. Line 3. EndOfMessage The string after << indicates where to stop. To send these lines to a file, use: cat > … Read more
Converting Int to String: let x : Int = 42 var myString = String(x) And the other way around – converting String to Int: let myString : String = “42” let x: Int? = myString.toInt() if (x != nil) { // Successfully converted String to Int } Or if you’re using Swift 2 or 3: … Read more
grep -nr ‘yourString*’ . The dot at the end searches the current directory. Meaning for each parameter: -n Show relative line number in the file ‘yourString*’ String for search, followed by a wildcard character -r Recursively search subdirectories listed . Directory for search (current directory) grep -nr ‘MobileAppSer*’ . (Would find MobileAppServlet.java or MobileAppServlet.class or … Read more
Use the strconv package’s Itoa function. For example: package main import ( “strconv” “fmt” ) func main() { t := strconv.Itoa(123) fmt.Println(t) } You can concat strings simply by +‘ing them, or by using the Join function of the strings package.