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What is the purpose of a stack? Why do we need it?
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UPDATE: I liked this question so much I made it the subject of my blog on November 18th 2011. Thanks for the great question!
I've always wondered: what is the purpose of the stack?
I assume you mean the evaluation stack of the MSIL language, and not the actua...
What GRANT USAGE ON SCHEMA exactly do?
...stgres database, so this is probably a stupid question. I assigned basic read-only permissions to the db role that must access the database from my php scripts, and I have a curiosity: if I execute
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How to read a large file - line by line?
...nt to iterate over each line of an entire file. One way to do this is by reading the entire file, saving it to a list, then going over the line of interest. This method uses a lot of memory, so I am looking for an alternative.
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Why doesn't C++ have a garbage collector?
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Implicit garbage collection could have been added in, but it just didn't make the cut. Probably due to not just implementation complications, but also due to people not being able to come to a general consensus fast enough.
A quote from Bjarne Stroustrup himself:
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Ignoring time zones altogether in Rails and PostgreSQL
... The current time zone is assumed. Postgres ignores any time zone modifier added to the input literal by mistake!
No hours are shifted for display. With the same time zone setting all is fine. For a different time zone setting the meaning changes, but value and display stay the same.
timestamptz
Ha...
INNER JOIN vs LEFT JOIN performance in SQL Server
...O(1) for the hashtable.
But change this query to be on the ID column instead of Name and you'll see a very different story. In that case, it does nested loops for both queries, but the INNER JOIN version is able to replace one of the clustered index scans with a seek - meaning that this will liter...
How do I find the duplicates in a list and create another list with them?
...= []
for x in a:
if x not in seen:
uniq.append(x)
seen.add(x)
or, more concisely:
seen = set()
uniq = [x for x in a if x not in seen and not seen.add(x)]
I don't recommend the latter style, because it is not obvious what not seen.add(x) is doing (the set add() method al...
What’s the difference between ScalaTest and Scala Specs unit test frameworks?
...ld go with operator notation, and ended up with matcher expressions that read very much like English sentences, with spaces between the words. Specs matcher syntax runs words together more with camel case.
Specs has more matchers than ScalaTest, and that I think reflects a difference in design atti...
Simplest PHP example for retrieving user_timeline with Twitter API version 1.1
...ails you want. For me, it didn't matter, because I just wanted to make a load of block requests to get rid of spam followers. The point is you are going to get yourself a set of unique keys to use for your application.
So, the point of creating an application is to give yourself (and Twitter) a set ...
What is the difference D3 datum vs. data?
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answered Dec 5 '12 at 19:33
josephmisitijosephmisiti
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