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Simplest way to profile a PHP script
...f APD is dated 2004, the extension is no longer maintained and has various compability issues (see comments).
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Which UUID version to use?
...guess another one) and can be traced back to your network card. It's not recommended to create these.
Version 4: These are generated from random (or pseudo-random) numbers. If you just need to generate a UUID, this is probably what you want.
If you need to always generate the same UUID from a give...
How to parse a CSV file using PHP [duplicate]
... can't deal with this example as found in wikipedia: en.wikipedia.org/wiki/Comma-separated_values#Example there has been an open bug, but it has been closed as "wont fix" bugs.php.net/bug.php?id=50686
– amenthes
Sep 7 '15 at 21:30
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MySQL - why not index every field?
...ning where to draw the line on indexes. How can you know? Just add them to commonly WHERED fields and hope for the best?
– Andrew
Jul 12 '17 at 15:34
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PSQLException: current transaction is aborted, commands ignored until end of transaction block
...org.postgresql.util.PSQLException: ERROR:
current transaction is aborted, commands ignored until end of transaction block
Summary:
The reason you get this error is because you have entered a transaction and one of your SQL Queries failed, and you gobbled up that failure and ignored it. But that w...
How do I check if an object has a specific property in JavaScript?
...roperty check to typeof this[property] or, even worse, x.key will give you completely misleading results.
It depends on what you're looking for. If you want to know if an object physically contains a property (and it is not coming from somewhere up on the prototype chain) then object.hasOwnProperty...
How can I get a precise time, for example in milliseconds in Objective-C?
...are many other ways to calculate this interval using NSDate, and I would recommend looking at the class documentation for NSDate which is found in NSDate Class Reference.
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How can I select rows with most recent timestamp for each key value?
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For the sake of completeness, here's another possible solution:
SELECT sensorID,timestamp,sensorField1,sensorField2
FROM sensorTable s1
WHERE timestamp = (SELECT MAX(timestamp) FROM sensorTable s2 WHERE s1.sensorID = s2.sensorID)
ORDER BY ...
What is SaaS, PaaS and IaaS? With examples
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IaaS, PaaS and SaaS are cloud computing service models.
IaaS (Infrastructure as a Service), as the name suggests, provides you the computing infrastructure, physical or (quite often) virtual machines and other resources like virtual-machine disk image ...