Browse questions answered by Jon Skeet

How can one extract number of trailing zeros from String

I want to extract trailing zeros from a string for eg //8320987112741390144276341183223364380754172606361245952449277696409600000000000000 should yield 14 my approach was to first...

The simplest option would probably be to use String.replaceAll: text = text.replaceAll("[0.]*$", ""); The $ makes sure it's only trimming the end of the string. Note that if you start with "0" you'll end up with an empty string - think... more 8/8/2014 11:29:52 AM

Why has object been created without importing class?

I came across some java code where the following statement was present. com.myproject.bar.Foo foo = new com.myproject.bar.Foo(); The class com.myproject.bar.Foo has not been...

An import statement just makes the type available by its short name without specifying the package. That's all it does. It's not like the class can't be used without an import. Usually it's clearer to use an import instead, but sometimes... more 8/8/2014 11:17:56 AM

Java: Send Date Object as JSONObject through Parse.com REST API

I am trying to create a new object in my Parse.com database through Parse's REST API, using an HttpsUrlConnection. Their REST API only accepts JSON. I have gotten everything to...

Your format doesn't match the one they've required. For example: Theirs: 2011-08-21T18:02:52.249Z Yours: 2011-08-21 18:02:52.249 You're missing the T and the Z. So try changing your format to: SimpleDateFormat formatter = new... more 8/8/2014 11:02:38 AM

Delegate with parameter passed as a method parameter how to access the delegate arg?

I'm trying to modify a delegate (itself passed as a parameter) to accept an additional parameter. This is the original method signature: public static T...

I suspect you want: public static T GetCacheItem<T>(String key, Func<string, T> cachePopulate) { // TODO: Try to get it from the cache // But if not... T result = cachePopulate(key); // TODO: Cache it ... more 8/8/2014 10:19:19 AM

Cannot get type by full name despite this type exists and is loaded

Weird problem, I get System.TypeLoadException "Could not load type 'Color'": using UnityEngine; Type.GetType(typeof(Color).FullName, true); Of course, I cannot just use...

Type.FullName doesn't include the assembly - so unless the type is in either the calling assembly or mscorlib, it won't be found. Basically, if you're trying to load a type from an arbitrary assembly there are two simple options: Use... more 8/8/2014 10:11:25 AM

Subtract dates in Linq EF6

Hello i have big problem with Subtract at Linq,EF6. I have date where repair should be finieshed. I woluld like to count how many days left. At ViewModel I have: public TimeSpan...

It's probably simplest to just fetch the data from EF, and then perform the arithmetic locally: var today = DateTime.Today; var rawData = from r in db.Repairs join c in db.Car on r.Car equals c.ID_Car join m in... more 8/8/2014 9:18:54 AM

How can I parse a weekday and time object to the next logical date from today?

I have a date in the string that looks like MON 07:15. I'm trying to parse this to a Date using this snippet of code: System.out.println(new SimpleDateFormat("E...

I would separate parsing from everything else. Parse the value as you're already doing, which gives you a date in the wrong year. From that, take the time of day and the day of week - those are the important things. You can throw... more 8/8/2014 8:50:43 AM

TreeSet.contains() does not call overwritten equals

i have a problem with the contains() method of TreeSet. As I understand it, contains() should call equals() of the contained Objects as the javadoc says: boolean...

As I understand it, contains() should call equals() of the contained Objects Not for TreeSet, no. It calls compare: A NavigableSet implementation based on a TreeMap. The elements are ordered using their natural ordering, or by a... more 8/8/2014 7:52:32 AM

update two list using linq

I want to update two lists using a LINQ query. I have an IDictionary<> value with ids and values. I want to update another list with relevant ids with relevant...

Well you can avoid nested loops by performing a dictionary lookup instead: public void UpdateList(IDictionary<int, int> sortOrder) { var current = GetList(); foreach (var item in current) { int value; if... more 8/8/2014 7:04:02 AM

List of upcoming Six months including this month

i can get the current month in this format by val dateFormat: SimpleDateFormat = new SimpleDateFormat("YYYYMM") dateFormat.format(new Date())//201408 but how get...

(Java syntax, but I'm sure you can change it to Scala easily enough.) In decreasing order of preference... With Java 8: // TODO: Which time zone are you interested in? YearMonth yearMonth = YearMonth.now(); DateTimeFormatter formatter =... more 8/8/2014 6:43:47 AM