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Why do we need argc while there is always a null at the end of argv?
...that the argv[argc] is always NULL , so I think we can traverse the argument list without argc . A single while loop will do this.
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Why is Thread.Sleep so harmful
I often see it mentioned that Thread.Sleep(); should not be used, but I can't understand why this is so. If Thread.Sleep(); can cause trouble, are there any alternative solutions with the same result that would be safe?
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Why does Hibernate require no argument constructor?
I got this hand-wavy answer but could somebody explain further? Thanks
9 Answers
9
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When should I use @classmethod and when def method(self)?
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Your guess is correct - you understand how classmethods work.
The why is that these methods can be called both on an instance OR on the class (in both cases, the class object will be passed as the first argument):
class Dummy(object):
@classmethod
def some_funct...
Can I protect against SQL injection by escaping single-quote and surrounding user input with single-
I realize that parameterized SQL queries is the optimal way to sanitize user input when building queries that contain user input, but I'm wondering what is wrong with taking user input and escaping any single quotes and surrounding the whole string with single quotes. Here's the code:
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Is there anyway to exclude artifacts inherited from a parent POM?
... from dependencies can be excluded by declaring an <exclusions> element inside a <dependency> But in this case it's needed to exclude an artifact inherited from a parent project. An excerpt of the POM under discussion follows:
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When is it practical to use Depth-First Search (DFS) vs Breadth-First Search (BFS)? [closed]
...y deep and solutions are rare, depth first search
(DFS) might take an extremely long time, but BFS could be faster.
If the tree is very wide, a BFS might need too much memory, so it
might be completely impractical.
If solutions are frequent but located deep in the tree, BFS could be
impractical.
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Applying function with multiple arguments to create a new pandas column
I want to create a new column in a pandas data frame by applying a function to two existing columns. Following this answer I've been able to create a new column when I only need one column as an argument:
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LINQ OrderBy versus ThenBy
...ices.InvoiceCollection
.OrderBy(o => o.InvoiceOwner.LastName)
.ThenBy(o => o.InvoiceOwner.FirstName)
.ThenBy(o => o.InvoiceID);
Note how you can use the same name each time. This is also equivalent to:
tmp = from o in invoices.InvoiceCollection
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Loading cross-domain endpoint with AJAX
...'t get a response. However using jsonp the browser is expecting a script mime type but is receiving "text/html".
9 Answers
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