Will match a backspace within a character class, \u0008. The backslash character (\) in the following table indicates that the character that follows it is a special character. For your quick reference, you can simply consider this regular expression cheat sheet PDF. Some other popular use cases of a regex are lexical analysis, search and replace dialogs of word processors and text editors, and text processing utilities.ĭue to its excessive importance, many people are eager to learn regex syntax and expressions to appear for interviews. Regular expression or regex is primarily used in Google Analytics in URL matching. Many programming languages come with built-in regex capabilities, while others provide via plug-ins. Many string-searching algorithms use regular expressions for ‘find’ and ‘find and replace’ operations on strings. A regular expression, also sometimes called rational expression, is a sequence of characters that defines a search pattern in the text. Without the use of regular expressions, you can not execute complex queries. It is an integral part of every programming language. (BTW, this behavior has persisted through Catalina to now Big Sur I have tried both Finder and Spotlight they both seem to work just fine when the file name includes spaces rather than hyphens, especially when I only search for a keyword from the middle of the file name.)Īt any rate, here's my main question: have I messed up by hyphenating hundreds of my files? or is there a way to correct this behavior, somehow, or perhaps work around it? Should I revert back to the space format? Is there a better, more efficient filing format-efficient in terms of Finder/Spotlight actually finding the particular file I have in mind using only one or two key words? But the problem is it is not consistent: sometimes it finds hyphenated files when I only include a keyword from the title sometimes it doesn't.Īs an experiment, I duplicated the file in question and renamed it, this time though replacing hyphens with spaces it works like a charm: Finder finds the file when I search for that particular keyword in the title. Unless I include author- before the first word of the title, Finder will not find that specific file, but does produce results with the exact search parameters for another file! (Supposing it might be a matter of spotlight indexing, I have removed and re-added the folder containing the file in question from spotlight privacy list to no avail.) So the issue is clear: Finder seems to be reading hyphenated filenames in the order the words appear in it such that I have to always insert the author- part of the name in my search keywords, in which case it always finds the file. But after a while I noticed a great deal of inconsistencies in Finder search result, especially when I would search for the first word in the title without including the author- or a combination of a couple of keywords in the title (with or without the hyphens) in the generic example above. (Here, I'm mostly concerned with pdfs and other text documents, but mostly pdfs.) That is, rather than naming a file, say, author title of the essay publication year.pdf, I would rename it to author-title-of-the-essay-2012.pdf-the file in question here consists of ten hyphened words and/or prepositions. Best Finder/Spotlight friendly method to name files on macOS Hi folks:įor a long time, I was under the impression that inserting hyphens (-) to punctuate a file name instead of space was the best practice in that it is more computer friendly I may have read it somewhere, not sure.
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