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How to succinctly write a formula with many variables from a data frame?
Suppose I have a response variable and a data containing three covariates (as a toy example):
6 Answers
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Nullable type issue with ?: Conditional Operator
...looking at the variable to which it is assigned, but by looking at the operands instead. It finds <null> and DateTime and instead of finding the common ancestor type, it just tries to find a conversion between each other. (Extra bit: C# recognizes a <null> type, i.e. the type of every nu...
How can sbt pull dependency artifacts from git?
I've heard (and I know I've seen examples too, if only I can remember where) that sbt can obtain dependencies from a git repo.
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Removing the fragment identifier from AngularJS urls (# symbol)
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Yes, you should configure $locationProvider and set html5Mode to true:
angular.module('phonecat', []).
config(['$routeProvider', '$locationProvider', function($routeProvider, $locationProvider) {
$routeProvider.
when('/phones', {templateUrl: 'partials/pho...
Click through div to underlying elements
...phaImageLoader, you can even put transparent .PNG/.GIFs in the overlay div and have clicks flow through to elements underneath.
CSS:
pointer-events: none;
background: url('your_transparent.png');
IE11 conditional:
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='your_transparent.p...
Returning value from called function in a shell script
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@ManuelJordan, Functions can only return exit codes and >&2 logs to stderror, so, the last echo is written to stdout, so, the calling function ONLY captures stdout and not stderr. Assuming execution is single threaded, a better option is to maintain a custom variable sp...
Is it not possible to stringify an Error using JSON.stringify?
...toJSON() may not be defined for Errors specifically, the method is still standardized for objects in general (ref: step 3). So, the risk of collisions or conflicts is minimal.
Though, to still avoid it completely, JSON.stringify()'s replacer parameter can be used instead:
function replaceErrors(ke...
How to install a specific JDK on Mac OS X?
...t I'm a bit surprised to only see downloadable versions for Linux, Windows and Solaris ...
16 Answers
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raw vs. html_safe vs. h to unescape html
...s declared on a helper, just like h, so it can only be used on controllers and views.
"SafeBuffers and Rails 3.0" is a nice explanation on how the SafeBuffers (the class that does the html_safe magic) work.
share
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Programmatically register a broadcast receiver
...etting() to control whether these components are active:
http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting(android.content.ComponentName, int, int)
Note if you are only interested in receiving a broadcast while you are running, it is better to...