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How to parse JSON in Scala using standard Scala classes?
...rvice.common.kit.{IsvCode}
import scala.util.Try
/**
*
*/
case class Order(log: String) {
implicit lazy val formats = org.json4s.DefaultFormats
lazy val json: json4s.JValue = parse(log)
lazy val create_time: String = (json \ "create_time").extractOrElse("1970-01-01 00:00:00")
lazy v...
How can I select rows with most recent timestamp for each key value?
...SELECT MAX(timestamp) FROM sensorTable s2 WHERE s1.sensorID = s2.sensorID)
ORDER BY sensorID, timestamp;
Pretty self-explaining I think, but here's more info if you wish, as well as other examples. It's from the MySQL manual, but above query works with every RDBMS (implementing the sql'92 standard...
Concurrent HashSet in .NET Framework?
...
@Ralf Well, it's a set, not a list, as it's unordered.
– Servy
Sep 20 '13 at 18:18
11
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Installing older version of R package
...rsions to install
# Note the names and version numbers must be in the same order
Names <- c("e1071", "gtools")
Vers <- c("1.6", "2.6.1")
# Install old package versions into the default library
InstallOldPackages(pkgs = Names, versions = Vers)
...
iPhone UITextField - Change placeholder text color
... be certain which method will be called, or if both with be called, or the order in which they will be called.
– sean woodward
Dec 10 '12 at 17:05
8
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Using Node.js only vs. using Node.js with Apache/Nginx
...vileges/setuid for the Node.js process. Only root can bind to port 80 typically. If you let nginx/Apache worry about starting as root, binding to port 80, and then relinquishing its root privileges, it means your Node app doesn't have to worry about it.
Serving static files like images, css, js, and...
PowerShell script to return versions of .NET Framework on a machine?
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If you're going to use the registry you have to recurse in order to get the full version for the 4.x Framework. The earlier answers both return the root number on my system for .NET 3.0 (where the WCF and WPF numbers, which are nested under 3.0, are higher -- I can't explain that), a...
What are the differences between a multidimensional array and an array of arrays in C#?
... @supercat: multi-dimensional arrays in C# are stored in row-major order, swapping the order of the subscripts would be slower since you would be accessing the memory non-consecutively. BTW the times reported are no longer accurate, I get almost twice as fast times for multi-dimensional arra...
Laravel Schema onDelete set null
...el / framework / src / Illuminate / Database / Schema / Grammars / Grammar.php)
– Dirk Jan
Mar 23 at 14:47
add a comment
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How to add an Access-Control-Allow-Origin header
...off2)$">
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
</FilesMatch>
also in your remote CSS file, the font-face declaration needs the full absolute URL of the font-file (not needed in local CSS files):
e.g.
@font-face {
font-fa...