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Why were pandas merges in python faster than data.table merges in R in 2012?
...umns are now allowed in keys and are preferred to
factor. data.table() and setkey() no longer coerce character to
factor. Factors are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R'...
How to make a new List in Java
We create a Set as:
24 Answers
24
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How to generate .json file with PHP?
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Fwrite could be turned off in your server settings
– Chris
Jan 19 '13 at 20:28
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How do I define and use an ENUM in Objective-C?
...ere's an example from my own code using NS_OPTIONS, I have an utility that sets a sublayer (CALayer) on a UIView's layer to create a border.
The h. file:
typedef NS_OPTIONS(NSUInteger, BSTCMBorder) {
BSTCMBOrderNoBorder = 0,
BSTCMBorderTop = 1 << 0,
BSTCMBorderRight ...
android splash screen sizes for ldpi,mdpi, hdpi, xhdpi displays ? - eg : 1024X768 pixels for ldpi
...There can be any number of different screen sizes due to Android having no set standard size so as a guide you can use the minimum screen sizes, which are provided by Google.
According to Google's statistics the majority of ldpi displays are small screens and the majority of mdpi, hdpi, xhdpi and ...
Eclipse add Tomcat 7 blank server name
...ipse
In {workspace-directory}/.metadata/.plugins/org.eclipse.core.runtime/.settings delete the following two files:
org.eclipse.wst.server.core.prefs
org.eclipse.jst.server.tomcat.core.prefs
Restart Eclipse
Source: eclipse.org Forum
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Eclipse: Enable autocomplete / content assist
...t; Preferences -> Java -> Editor -> Content assist and check your settings here
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'Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of
... icon sizes and send it to your email. Then follow the following method to set icons for iOS app.
After Apple launched iOS 8, iPhone 6 and 6 Plus, the app icon sizes and launch image sizes changed. Please visit my post for new sizes:
Image resolution for new iPhone 6 and 6+, @3x support added?
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HTTPS setup in Amazon EC2
...u only opened port 443 on the machine which is step 1. Second, you need to setup your server on that machine to listen to 443 port (instead of default HTTP port 80) and accept HTTPS traffic. Which server do you use?
– Yuriy Nakonechnyy
Dec 22 '16 at 9:49
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What is the difference between class and instance methods?
...ethods with multiple selector parts are written like -[NSMutableDictionary setObject:forKey:] etc. You'll often see this notation in Cocoa responses, documentation, and in Xcode.
– Quinn Taylor
Jun 27 '09 at 23:29
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