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What is declarative programming? [closed]
...rds:-
Sets of declarations, or declarative statements, each of which has meaning (often in the problem domain) and may be understood independently and in isolation.
Imperative programming tends towards:-
Sequences of commands, each of which perform some action; but which may or may not have m...
In which order do CSS stylesheets override?
...REC-CSS2-20110607/cascade.html#cascade
In short: more specific rules override more general ones. Specificity is defined based on how many IDs, classes, and element names are involved, as well as whether the !important declaration was used. When multiple rules of the same "specificity level" exist, ...
Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
... compare algorithms in the same domain. Most likely, when we say O(n), we mean that it's "O(n) comparisons" or "O(n) arithmetic operations". That means, you can't compare any pair of algorithms or applications.
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Erlang's 99.9999999% (nine nines) reliability
...1 (which was all he ever said, avoiding specifics). It doesn't necessarily mean Erlang is the only cause of such high reliability.
EDIT: In fact, "20 years" itself seems like a misinterpretation. Joe mentions a figure of 20 years in the same article, but it's not actually connected to the nine-nines...
Explode PHP string by new line
...tter for me, because it results in success even if nothing is present. "?" means 0 or one time, so it is possible for it to match even if both \r and \n are not present. You say "fixed" but I don't see that. I used /(\r|\n)+/ instead.
– Rolf
Aug 5 '13 at 14:16
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What's the easiest way to install a missing Perl module?
...module path separator not the usual double colons. (Perhaps because colons mean drives in dos?) That has got me a few times ;)
– Matthew Lock
Aug 19 '13 at 23:48
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ActionController::InvalidAuthenticityToken
... start: Understanding the Rails Authenticity Token
Edited to explain:
It means they are calling the action to process your form submit without ever rendering your form on your website. This could be malicious (say posting spam comments) or it could indicate a customer trying to use your web servic...
MySQL how to join tables on two fields
I have two tables with date and id fields. I want to join on both fields. I tried
3 Answers
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SQL Server: SELECT only the rows with MAX(DATE)
...teEntered) FROM yourTable WHERE orderNo = [data].orderNo)
Or...
WHERE
ID = (SELECT TOP 1 ID FROM yourTable WHERE orderNo = [data].orderNo ORDER BY DateEntered DESC)
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Change Placeholder Text using jQuery
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You can use following code to update a placeholder by id:
$("#serMemtb").attr("placeholder", "Type a Location").val("").focus().blur();
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