843 reputation
613
bio website google.com/+DanielPryden
location Silicon Valley
age 31
visits member for 3 years, 9 months
seen yesterday

I started tinkering with computers at the age of 6. These days, I'm a senior software engineer at Google, currently working on Java application server infrastructure.

Besides being fluent in English and American Sign Language, I know too many programming languages to count. Lately I've primarily been using Java, plus some odds and ends of Python, C++, and JavaScript. I enjoy C#, even though nowadays I don't get many chances to use it. I'm also a big fan of Haskell and Scala, although I haven't had a chance to use either of them in a large-scale project yet.

In my spare time, I play guitar and read voraciously, including science fiction and books on computing. I'm also a volunteer minister for the deaf, teaching Bible studies in American Sign Language.

Standard disclaimer: my opinions are my own, and not necessarily those of my employer.


Nov
6
comment Examples of when we'll use interpreted language over compiled language?
-1 because you imply that all interpreted languages are dynamically typed and all compiled languages are statically typed, which is completely untrue.
Oct
15
awarded  Yearling
Oct
9
comment Using “Google Guava” in coding interviews
+1 for asking. As a point of interest, when I interviewed at Google I asked if I could use Guava and my interviewer was OK with it. YMMV of course.
Oct
4
comment What functionality does dynamic typing allow?
@WarrenP: You assert that "dynamic type systems reduce the amount of extra cruft I have to type in" -- but then you compare Python to C++. That isn't a fair comparison: of course C++ is more verbose than Python, but that's not because of the difference in their type systems, it's because of the difference in their grammars. If you just want to reduce the number of characters in your program source, learn J or APL: I guarantee they'll be shorter. A more fair comparison would be to compare Python to Haskell. (For the record: I love Python and prefer it over C++, but I like Haskell even more.)
Oct
4
comment What functionality does dynamic typing allow?
@CzarekTomczak: That is a feature of some dynamically-typed languages, yes. But it is possible for a statically-typed language to be modifiable at runtime. For example, Visual Studio allows you to rewrite C# code while you're at a breakpoint in the debugger, and even rewind the instruction pointer to re-run your code with new changes. As I quoted Chris Smith in my other comment: "Many programmers have used very poor statically typed languages" -- don't judge all statically typed languages by the ones you know.
Oct
4
comment What functionality does dynamic typing allow?
@Justin984: I'm glad you enjoyed the article -- it changed how I think about static vs. dynamic typing too. But my comment wasn't really directed at answering your question, just helping to frame it. If you feel the article answers your question, why not add it as an answer yourself? That way you can explain what you think the answer to your question is, and you can mark it as accepted.
Oct
3
comment What functionality does dynamic typing allow?
@grieve: No, eval() cannot be statically typed (although similar things, like expression trees, can be). I'm not sure if that's actually a compelling argument in favor of dynamic types, but it is a differentiating feature, so I've removed my downvote.
Oct
3
comment What functionality does dynamic typing allow?
@grieve: I understand why you make the distinction, but from a type-theoretical point of view, there is no difference between a function that returns one of three possible types and a function that returns a value of an algebraic data type with three data constructors. You say that you have never seen this feature in any statically typed language, but the point of abarnert's comment is that it is perfectly possible to do exactly this in almost any statically-typed functional language. So this feature, while useful, has nothing to do with whether the language is statically or dynamically typed.
Oct
3
awarded  Pundit
Oct
3
comment What functionality does dynamic typing allow?
As Chris Smith writes in his excellent essay What to know before debating type systems: "The problem, in this case, is that most programmers have limited experience, and haven't tried a lot of languages. For context, here, six or seven doesn't count as "a lot." ... Two interesting consequences of this are: (1) Many programmers have used very poor statically typed languages. (2) Many programmers have used dynamically typed languages very poorly."
Oct
3
comment What functionality does dynamic typing allow?
@RobertHarvey: When I was writing a lot of C# code, I used LINQPad as basically a REPL for C#, which allowed me to write code in a more dynamic-ish workflow.
Sep
6
comment Getting out of my head
Related to the "rules" based approach, running static analysis tools (e.g. lint for C, JsLint for JavaScript, Findbugs for Java, FxCop for .NET) can often give useful hints, and code metrics (e.g. cyclomatic complexity, LCOM4) can show you what parts of the code may be problematic. Of course, you should always use your brain and take the advice of such tools with a grain of salt.
Aug
3
comment What backs up the claim that C++ can be faster than a JVM or CLR with JIT?
+1 -- overall, this is a good answer. However, I'm not sure the "there is no stack allocation" bullet point is entirely accurate. Java JITs often do escape analysis to allow for stack allocation where possible -- perhaps what you should say is that the Java language doesn't allow the programmer to decide when an object is stack-allocated versus heap-allocated. Additionally, if a generational garbage collector (which all modern JVMs use) is in use, "heap allocation" means a completely different thing (with completely different performance characteristics) than it does in a C++ environment.
Jul
26
awarded  Good Answer
Jul
25
awarded  Nice Answer
Jul
25
answered Are unit tests really that useful?
Jul
24
comment Pair Programming and ISO 27001
+1, this is what is done at my company. We have the choice of peer code review or pair programming. The pair programming case is just a special case of peer review, where the peer has been reviewing continuously while the code was written.
Jul
9
comment Unit testing time-bound code
Note that Guava has the Ticker class for just this purpose.
Jun
11
awarded  Citizen Patrol
May
25
comment When using method chaining, do I reuse the object or create one?
Hmm... I've always called the final method of the builder pattern build() (or Build()), not the name of the type it builds (Car() in your example). Also, if Car is a truly immutable object (e.g., all its fields are readonly), then even the builder won't be able to mutate it, so the Build() method becomes responsible for constructing the new instance. One way to do this is to have Car have only a single constructor, which takes a Builder as its argument; then the Build() method can just return new Car(this);.