The titles of youtube-videos often contain notations on which part of a sequence (e.g. ‘part 1/9′) one is watching. This is fine in YouTube, but unbearable if one aggregates the xml-feed for custom purposes (like I do in my favorites-player). Since regex can be used in dynamic as well as clientside languages and many applications, I decided to set up a regex search expression eliminating all possible variations while leaving similar yet not connatural strings untouched:
- Red: The fraction itself is always assembled of one or more digits slash one or more digits. The expression will not affect numbers alone.
- Blue: There might be various kinds of brackets used to enclose the fraction - or even no brackets at all.
- Green: Often the fraction is preceeded by an indicator like ‘part’ or a translation of this. It is removed given there is a space before it (so ‘im Gegenteil 1/2 so hoher Verbrauch’ will not be erased).
- Orange: If the title starts with the fraction the space between potential indicator and fraction must not be mandatory. Possibly the indicator is seperated from the title by a comma, which will then be removed.
In javascript the adjustment of YouTube-titles might look like this:
// Adjust title
// −−−−−−−−−−−−
// Get title from somewhere
var title = “Regex to clean up YouTube titles, part (1/3)”;
// Search regex and replace with nothing
var titleClean = title.replace(/(\,|)( Part| part| Teil| teil| Parte| parte|)( |)(\(|\[|\{| ?)[0-9]{1,3}\/[0-9]{1,3}(\)|\]|\}| ?)/g, ”);
// Debugging
alert(”Input: ‘”+title+”‘\nOutput: ‘”+titleClean+”‘”);
</script>
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