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How does a hash table work?
...e 30,000 possible clients or so are mapped to a smaller space.
The main idea in this is to divide your entire data set into segments as to speed up the actual searching which is usually time consuming. In our example above, each of the 300 filing cabinet would (statistically) contain about 100 r...
Does a foreign key automatically create an index?
...es nothing automatically for the referencing end, though it's often a good idea to make one yourself. See stackoverflow.com/questions/970562/…
– Craig Ringer
Aug 23 '12 at 4:56
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What exactly is an “open generic type” in .NET? [duplicate]
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Also, I have no idea how to construct that (or represent the type), might be a worthwhile question.
– leppie
Jan 31 '10 at 21:11
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Formatting Decimal places in R
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Thanks @mpag, I had no idea that R struggled with rounding on boundaries, I've just tried it with 5.565 which does round up, while 5.545 rounds down. I guess it is the way they are handling floating point inprecision. I don't think I've seen this...
Is there a Python equivalent of the C# null-coalescing operator?
...ge is PEP 505 and the discussion relevant to the document is in the python-ideas thread.
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Android List Preferences: have summary as selected value?
...but the proper solution is to find the caption for the value. Anyways, the idea works:
public class Preferences extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.yo...
Classpath including JAR within a JAR
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+1 for the idea in this answer (though I won't be +1'ing the answer itself): you can't re-package any signed JAR file, so this technique can't be used in many situations (e.g. Java's activation.jar).
– Christopher ...
Why use deflate instead of gzip for text files served by Apache?
... the payload possibly be broken, if it is transmitted using TCP? The whole idea of TCP is to transmit unbroken payloads.
– user1095108
Nov 23 '18 at 17:13
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Can I change a private readonly field in C# using reflection?
...nt to? Intentionally breaking encapsulation seems like a horrifically bad idea to me.
Using reflection to change a readonly or constant field is like combining the Law of Unintended Consequences with Murphy's Law.
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How do I check to see if a value is an integer in MySQL?
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The 'ceil(field) = field' test is a nice idea, but as @Jumpy pointed out, it fails on non-numeric data: SELECT ceil('four') = 'four'; -> 1
– Matthew Cornell
Jul 17 '13 at 16:23
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