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Why does Enumerable.All return true for an empty sequence? [duplicate]
... thing I check when a function doesn't behave as I expect. Invariably someone with a huge reputation like Jon Skeet not only finds the pertinent snippet of documentation but also explains why my expectations were wrong to begin with. We're spoiled by SO...
– ThisGuy
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Throwing the fattest people off of an overloaded airplane.
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One way would be to use a min heap (std::priority_queue in C++). Here's how you'd do it, assuming you had a MinHeap class. (Yes, my example is in C#. I think you get the idea.)
int targetTotal = 3000;
int totalWeight = 0;
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How important is the order of columns in indexes?
...t not for B=@b, for C=@c norB=@b AND C=@c. The case A=@a AND C=@c is mixed one, as in the A=@a portion will use the index, but the C=@c not (the query will scan all B values for A=@a, will not 'skip' to C=@c). Other database systems have the so called 'skip scan' operator that can take some advantag...
What is the difference between syntax and semantics in programming languages?
...ion at address x".
If x is a scalar, the meaning of the statement is "add one to the value at address x and store the result into the location at address x".
Finally, note that some semantics cannot be determined at compile-time and must therefore must be evaluated at run-time. In the ++ operator...
Interactive search/replace regex in Vim?
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I'm honestly not trying to come across as snarky, but all of this could have been found by doing ":help :s" which would have led you straight to ":help :s_flags".
– Jeremy Cantrell
Feb 5 '09 ...
Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...thon installed, /usr/bin/env will ensure the interpreter used is the first one on your environment's $PATH. The alternative would be to hardcode something like #!/usr/bin/python; that's ok, but less flexible.
In Unix, an executable file that's meant to be interpreted can indicate what interpreter t...
How to create a MySQL hierarchical recursive query
... if the pv string would for some reason yield a falsy value.
All in all, one may find these assumptions too risky to rely on. The documentation warns:
you might get the results you expect, but this is not guaranteed [...] the order of evaluation for expressions involving user variables is und...
Windows shell command to get the full path to the current directory?
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Honestly, I couldn't think of anything else they might be trying to ask as the question stated.
– Trevor Bramble
Mar 3 '09 at 19:11
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T-SQL Cast versus Convert
...AST versus CONVERT ? Is there any performance issues related to choosing one versus the other? Is one closer to ANSI-SQL?
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Multiple lines of text in UILabel
...s of text in UILabel like in the UITextView or should I use the second one instead?
25 Answers
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