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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
...t everytime. Why is this, and how can I clone or copy the list to prevent it?
22 Answers
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How to pull a random record using Django's ORM?
I have a model that represents paintings I present on my site. On the main webpage I'd like to show some of them: newest, one that was not visited for most time, most popular one and a random one.
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Difference between Hive internal tables and external tables?
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Hive has a relational database on the master node it uses to keep track of state.
For instance, when you CREATE TABLE FOO(foo string) LOCATION 'hdfs://tmp/';, this table schema is stored in the database.
If you have a partitioned table, the partitions are stored in the data...
Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
... understand, this question relates to how to expose a loosely coupled API with some appropriate defaults. In this case, you may have a good Local Default, in which case the dependency can be regarded as optional. One way to deal with optional dependencies is to use Property Injection instead of Cons...
Difference between id and name attributes in HTML
...ols respond differently. For example, you may have several radio buttons with different id attributes, but the same name. When submitted, there is just the one value in the response - the radio button you selected.
Of course, there's more to it than that, but it will definitely get you thinking i...
Convert php array to Javascript
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Spudley's answer is fine.
Security Notice: The following should not be necessary any longer for you
If you don't have PHP 5.2 you can use something like this:
function js_str($s)
{
return '"' . addcslashes($s, "\0..\37\"\\") . '"';
}
function js_ar...
Windows batch files: .bat vs .cmd?
As I understand it, .bat is the old 16-bit naming convention, and .cmd is for 32-bit Windows, i.e., starting with NT. But I continue to see .bat files everywhere, and they seem to work exactly the same using either suffix. Assuming that my code will never need to run on anything older than NT, d...
Which is faster: while(1) or while(2)?
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Both loops are infinite, but we can see which one takes more instructions/resources per iteration.
Using gcc, I compiled the two following programs to assembly at varying levels of optimization:
int main(void) {
while(1) {}
return 0;
}
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setImmediate vs. nextTick
...introduced setImmediate . The API changes documentation suggests using it when doing recursive nextTick calls.
7 Answ...
.Net picking wrong referenced assembly version
...t copied an existing project to a brand new machine to start developing on it and have run into a problem with the version of one of my referenced assemblies (a telerik DLL as it happens).
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