halivingston - Developer IT

HashSet versus HashTable w.r.t searching if an item exists

- by halivingston

HashSet<T> t = new HashSet<T>(); // add 10 million items HashTable<T> t = new HashTable<T>(); // add 10 million items. Whose .Contains method will return quicker?

HashSet versus Dictionary<T, K> w.r.t searching time to find if an item exists

HashSet<T> t = new HashSet<T>(); // add 10 million items Dictionary<T, K> t = new Dictionary<T, K>(); // add 10 million items. Whose .Contains method will return quicker? Just to clarify, my requirement is I have 10 million objects (well, strings really) that I need to check if they exist in the Data Structure. I will NEVER iterate.

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Recursion Interview Questions [closed]

- by halivingston

Given a string, "ABC", print all permutations Given a dollar bill, fill out possible ways it can summed up using .25, .10, .5, etc. Given a phone number (123-456), print out all it's word counter parters like (ADG-XYZ) A B C D E F G H I J K L M N O P In the above 2D matrix, print all possible words (just literally all words, and sure we could check if it's exists in a dictionary). The base case is I think here is that reaching the same i, j positions. Any others you can think of?

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WPF - TextChangedEventArgs being fired twice, and when can e.Changes be greather than 1?

- by halivingston

TextChangedEventArgs is being fired twice in my RichTextBox control. Is this normal? Also, when will e.Changes (you know the TextChangedEventArgs) be 1. The only case I can think of is someone pasting content into it. But other times it seems in normal typing a person can really only change 1 paragraph right?

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Preparing for a C#, ASP.NET, JavaScript interview

- by halivingston

I have an interview I'm prepping for, I've written A LOT of code, specifically in C# and ASP.NET. I've written fair amounts of JavaScript, but no OO stuff in it. So I'm definately going to brush up on that. I remember for a previous job interview, I was asked Java questions, like not super intricate, but detailed stuff. Now I'm looking for a book maybe that I can read through in a day (or two) and known all the crannies of C#, ASP.NET and JavaScript. Different books obviously I'll be honest, for the Java interview, I actually read The J2EE certification book, and it helped A LOT!

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Can an ASP.NET page be a WebService also?

- by halivingston

I know it's a little odd, specifically because a Page inherits from the System.Web.Page (or something) and a WebService inherits from System.Web.Service (or something). But just thought I'd ask if there is any way to do this? Does anyone have suggestions to do this?

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Parsing C# code to evaluate expressions (basically, implementing Intellisense)

- by halivingston

I'm trying to evaluate C# code as it gets typed, think of it as if I'm trying to write an IDE. So a person types code, I want to find out what code did he just write: String x = ""; I want to now register that x is a type of String. And now everytime the user types x again, and I want to show him all the things he can do with x, basically like Visual Studio Intellisense. Will I need some lexers or parsers for this? Will that make it easier? I've heard VS 2010 has some features around this that Microsoft has released. Any ideas?

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C# - Check a bool for a value and then flip it

- by halivingston

for (int i = 0; i < X; i++) myitem = (checkedDB) ? dirtyItem : cleanItem; I wanted to know if there's a way of flipping checkedDB in the same statement, i.e. the next iteration checkedDB is the opposite of it's value, so like XORing.

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All possible types of interview questions

- by halivingston

A lot of tech interviews asks these "kinds" of questions, so I thought I'd make a list for myself and others: (1) Linked Lists (2) Strings (3) Trees (4) Bitwise Manips (6) Recursion (I hate these ones, I can never get these, any tips?)

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