I’m a Swift newbie. I need for something like Python’s BeautifulSoup in Swift iOS project. Precisely, I need to get all href of <a> that ends with “.txt”. What are the steps that I should take? Answer There are several nice libraries of HTML Parsing using Swift and Objective-C like the followings: hpple NDHpple Kanna( … Read more
I’m following this tutorial. It works great but I would like it to return an array with all the strings instead of a single string with the last element. Any ideas how to do this? Answer So you want to build a XML parser to parse a RSS feed like this one. <rss version=”0.92″> <channel> … Read more
I’m trying to make a very simple ‘counter’ that is supposed to keep track of how many times my program has been executed. First, I have a textfile that only includes one character: 0 Then I open the file, parse it as an int, add 1 to the value, and then try to return it … Read more
What is the smartest way to design a math parser? What I mean is a function that takes a math string (like: “2 + 3 / 2 + (2 * 5)”) and returns the calculated value? I did write one in VB6 ages ago but it ended up being way to bloated and not very … Read more
I want to verify the syntax of files containing sql queries before they can be committed in my CVS project. In order to do that, I have a commitinfo script, but I have trouble finding out if the sql commands are valid. psql does not seem to have a dryrun mode, and constructing my own … Read more
how would you extract the domain name from a URL, excluding any subdomains? My initial simplistic attempt was: ‘.’.join(urlparse.urlparse(url).netloc.split(‘.’)[-2:]) This works for http://www.foo.com, but not http://www.foo.com.au. Is there a way to do this properly without using special knowledge about valid TLDs (Top Level Domains) or country codes (because they change). thanks Answer Here’s a great … Read more
If I do: var number = 3500; alert(number.toLocaleString(“hi-IN”)); I will get ३,५०० in Hindi. But how can I convert it back to 3500. I want something like: var str=’३,५००’; alert(str.toLocaleNumber(“en-US”)); So, that it can give 3500. Is it possible by javascript, jquery or any other free library? Answer I think you are looking for something … Read more
Is there a good resource online with a collection of grammars for some of the major parsing algorithms (LL(1), LR(1), LR(0), LALR(1))? I’ve found many individual grammars that fall into these families, but I know of no good resource where someone has written up a large set of example grammars. Does anyone know of such … Read more
How does Google find relevant content when it’s parsing the web? Let’s say, for instance, Google uses the PHP native DOM Library to parse content. What methods would they be for it to find the most relevant content on a web page? My thoughts would be that it would search for all paragraphs, order by … Read more
This question already has answers here: Safe String to BigDecimal conversion (9 answers) Closed 8 years ago. I have this String: 10,692,467,440,017.120 (it’s an amount). I want to parse it to a BigDecimal. The problem is that I have tried both DecimalFormat and NumbeFormat in vain. Answer Try this // Create a DecimalFormat that fits … Read more
