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PostgreSQL - fetch the row which has the Max value for a column
... vary in production based on actual machine load/data access spread. When one query appears slightly faster (<20%) than the other but has a much higher cost, it will generally be wiser to choose the one with higher execution time but lower cost.
When you expect that there will be no competition...
Why exactly is eval evil?
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There are several reasons why one should not use EVAL.
The main reason for beginners is: you don't need it.
Example (assuming Common Lisp):
EVALuate an expression with different operators:
(let ((ops '(+ *)))
(dolist (op ops)
(print (eval (list op 1...
Importing Maven project into Eclipse
...nt to import existing maven project into eclipse. I found 2 ways to do it, one is through running from command line mvn eclipse:eclipse and another is to install maven eclipse plugin from eclipse. What is the difference between the both and which one is preferable?
The maven-eclipse-plugin is a Ma...
Which is a better way to check if an array has more than one element?
I just need to check if an array has more than one element.
I am trying to do it this way :
11 Answers
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Should I use SVN or Git? [closed]
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SVN is one repo and lots of clients. Git is a repo with lots of client repos, each with a user. It's decentralised to a point where people can track their own edits locally without having to push things to an external server.
SVN i...
What does extern inline do?
... and externally visible. Hence you can only have such an inline defined in one compilation unit, and every other one needs to see it as an out-of-line function (or you'll get duplicate symbols at link time).
extern inline will not generate an out-of-line version, but might call one (which you theref...
Implementing comparison operators via 'tuple' and 'tie', a good idea?
...sometimes tend to choose a std::pair , as all important stuff is already done for that datatype, like operator< for strict-weak-ordering.
The downsides though are the pretty much useless variable names. Even if I myself created that typedef , I won't remember 2 days later what first and w...
HTML input - name vs. id [duplicate]
...<id>)
Shares same name space as name attribute
Must contain at least one character
Must begin with a letter
Must not contain anything other than letters, numbers, underscores (_), dashes (-), colons (:), or periods (.)
Is case insensitive
In (X)HTML5, everything is the same except:
Name Att...
How to check for a valid URL in Java?
... UrlValidator to work with our wierd intranet top level domain. The common ones like .com, .org, and such works. I am not interested in creating a RegExp for this matter so the new URL(name).toURI() become the solution.
– Avec
Apr 30 '19 at 15:14
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Static member functions error; How to properly write the signature?
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I'm guessing you've done something like:
class Foo
{
static void Bar();
};
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static void Foo::Bar()
{
...
}
The "static void Foo::Bar" is incorrect. You don't need the second "static".
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