String.len(str) returns the length of the string. It additionally supports a new format character %q, which formats a string value in a way that can be read back by Lua, escaping or quoting characters as needed (for example quotes, newlines, etc.).
#Hammerspoon iso
String.format(formatstring, …) formats a sequence of values according to the given format string, following the same formatting rules as the ISO C sprintf() function. > for cap in string.gmatch ( a, "%w+" ) do print ( cap ) end Hammerspoon is awesome For example, the following two are equivalent: All of these functions can be called either as regular functions, with the string as the first argument, or as method calls on the string itself, using the colon syntax (which, as we saw before, gets converted to the same call). Lua includes the string library to implement common string manipulation functions, including pattern matching. Patterns, just like regular expressions, are commonly used for string manipulation, using primarily functions from the string library.
#Hammerspoon install
Unfortunately these are not included in Lua, so you would need to install them on your own. If you encounter something that really cannot be done, you can always resort to libraries like Lrexlib, which provide interfaces to real regex libraries. For example %d for digits, %s for spaces, %w for alphanumeric characters.įor most common use cases, Lua patterns are enough, you just have to be aware of their differences. Most character classes are represented by the same characters, but preceded by ampersand. The escape character is the ampersand ( %) instead of the backslash ( \). match the shortest possible string instead of the longest one) of the previous character, unlike in regexes, in which it’s commonly indicate by a question mark following the corresponding * or + The regex. The dash ( -) represents a non-greedy “zero or more” (i.e. The caret ( ^) and dollar sign ( $) represent “beginning of string” and “end of string”, just like in regexes. Unlike regexes, these characters can only be applied to a single character and not to a whole capture group (i.e. the regex (foo)+ is not possible).Īlternations, represented by the vertical bar ( |) in regexes, are not supported.
#Hammerspoon plus
The asterisk ( *), plus sign ( +) and question mark ( ?) represent “zero or more”, “one or more” and “one or none” of the previous character, just like in regexes. ) represents any character, just like in regexes. The following are some differences and similarities you need to be aware of when using patterns: They are used by many functions in the string library like string.find() and string.match(). Lua has patterns, which fulfill many of the same functions but have a different syntax and some limitations. If you are familiar with regular expressions, you know how powerful they are for examining and manipulating strings in any programming language. hs.distributednotifications), this technique can be useful.
#Hammerspoon full
This is a matter of taste-I usually prefer to have the full descriptive names (makes the code easier to read), but when dealing with some of the longer module names (e.g. This avoids the console message and has the additional benefit of allowing you to use app (you can use whatever variable you want) instead of typing hs.application in your code. app = require ( 'hs.application' ) > app.get ( "Terminal" ) hs.application : Terminal ( 0圆10000e49118 )
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