Browse questions answered by Jon Skeet

Validate octal number

Is this a valid way to validate if a string contains only octal numbers? public static bool IsOctal(String toCheck) { if (toCheck.Contains(" ")) { return false; ...

It's not at all clear what your current approach is trying to achieve, as it's converting in both decimal and octal. If you just want to check whether the string only contains digits 0-7, it's probably simplest to use a regex: using... more 8/13/2014 8:25:38 PM

Months between two integer dates

I have 2 dates as integers. How can i find the month difference between these two integers in c#? For example: Int32 beginDate= 20130307(yyyymmdd) Int32 beginDate=...

You can use my Noda Time library for that. It was created specifically to make things like this simpler. // TODO: Encapsulate this conversion in a separate method LocalDate start = new LocalDate(beginDate / 10000, ... more 8/13/2014 4:02:09 PM

C# Extension Method Return Value Not Setting Variable

Why doesn't this extension method set the value it's applied to? public static byte ExtSetBits(this byte original, byte value, byte bitSize) { unchecked { original &=...

Am I missing something? Yes - you're not using the return value of the method in your first snippet. All you need is to set the return value, just as you're doing in the working case (your second code snippet). Changing the value of... more 8/13/2014 2:41:05 PM

Date formatting not working

I am trying to convert the string to date and i want that date to be in this format 'yyyy-MM-d HH:mm:ss' and i no how to get this format in string my question is i want to get...

i want to get Date in above format not as string but as 'Date '? You're asking for a Date in a particular format - that's like saying "I want an int in hex format." A Date doesn't have a format - it's just an instant in time. It... more 8/13/2014 1:40:20 PM

Couldn't save an Integer in a Object Array

I want to parse an String from an Object[] into an Integer and save it at the same place like this: public class ArrParseTest { public static void main(String[] args) { ...

This is the problem causing the immediate issue you're seeing: arr = input.split(";", -1); You're assigning a reference to an object of type String[] to a variable of type Object[]. That's fine, but it means you can't store non-string... more 8/13/2014 12:01:19 PM

Same date different long time

i've a object Date as for example this date "Fri Aug 01 00:00:00 CDT 2014" that through this validation: Date fechaInicio = filtros.containsKey("dateFechaInicio") ?...

You're only setting values down to the second, so the millisecond part is left at whatever it was from new Date(). Your description isn't entirely clear, but I suspect you just want: fechaMin.set(Calendar.MILLISECOND, 0); Alternatively,... more 8/12/2014 9:17:30 PM

What to do with never happening, useless exceptions?

I have this code: HttpPut put = new HttpPut(url); try { put.setEntity(new StringEntity(body, "UTF-8")); } catch (UnsupportedEncodingException e1) { // That would really...

I would throw some kind of RuntimeException which indicates that you think this really should never happen. That way: If it ever does happen, you find out about it rather than swallowing it and continuing Your expectation that it really... more 8/12/2014 8:21:55 PM