You can take advantage of Template Literals and use this syntax: Template literals are enclosed by the back-tick (` `) (grave accent) instead of double or single quotes. This feature has been introduced in ES2015 (ES6). Example How neat is that? Bonus: It also allows for multi-line strings in javascript without escaping, which is great for templates: Browser support: … Read more
Only double quoted strings interpret the escape sequences \r and \n as ‘0x0D’ and ‘0x0A’ respectively, so you want: Single quoted strings, on the other hand, only know the escape sequences \\ and \’. So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string “\r\n” or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break … Read more
To complement marsze’s helpful answer: ${…} (enclosing the variable name in { and }) is indeed always necessary if a variable name contains special characters, such as spaces, ., or -. Not special are _ and – surprisingly and problematically – ?. Note: : is invariably interpreted as terminating a PowerShell drive reference, in the context of namespace variable notation, irrespective of whether {…} enclosure is used or required (e.g., in $env:USERNAME or ${env:USERNAME}, env refers to the PowerShell drive representing all environment variables). In the context … Read more
In JavaScript you can use template literals:
Looking, it turns out on my system there is an envsubst command which is part of the gettext-base package. So, this makes it easy: Note if you want to use the same file for both, you’ll have to use something like moreutil’s sponge, as suggested by Johnny Utahh: envsubst < “source.txt” | sponge “source.txt”. (Because the shell redirect will … Read more
If you’re using Java 5 or higher, you can use String.format:
Python 3.6 will add literal string interpolation similar to Ruby’s string interpolation. Starting with that version of Python (which is scheduled to be released by the end of 2016), you will be able to include expressions in “f-strings”, e.g. Prior to 3.6, the closest you can get to this is The % operator can be … Read more
Since ES6, you can use template literals: Expand snippet P.S. Note the use of backticks: “.