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Aggregate / summarize multiple variables per group (e.g. sum, mean)
...reshape2 package for this task:
require(reshape2)
df_melt <- melt(df1, id = c("date", "year", "month"))
dcast(df_melt, year + month ~ variable, sum)
# year month x1 x2
1 2000 1 -80.83405 -224.9540159
2 2000 2 -223.76331 -288.2418017
3 2000 3 -188.83930 -481.560...
What is meant by the term “hook” in programming?
...but was unable to find a good answer. Would someone be able to give me an idea of what this term generally means and perhaps a small example to illustrate the definition?
...
How to set custom header in Volley Request
...
It looks like you override public Map<String, String> getHeaders(), defined in Request, to return your desired HTTP headers.
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How to set an iframe src attribute from a variable in AngularJS
...ction AppCtrl($scope, $sce) {
// ...
$scope.setProject = function (id) {
$scope.currentProject = $scope.projects[id];
$scope.currentProjectUrl = $sce.trustAsResourceUrl($scope.currentProject.url);
}
}
In the Template:
<iframe ng-src="{{currentProjectUrl}}"> <!--co...
Change the URL in the browser without loading the new page using JavaScript
...shState(stateObj, "page 2", "bar.html");
}
var link = document.getElementById('click');
link.addEventListener('click', change_my_url, false);
</script>
and a href:
<a href="#" id='click'>Click to change url to bar.html</a>
If you want to change the URL without adding an entr...
How to fix “no valid 'aps-environment' entitlement string found for application” in Xcode 4.3?
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If you created your provisioning profile before configuring the app ID for push, try to regenerate the provisioning profile.
iOS Provisioning Portal -> Provisioning -> Your cert -> EDIT -> Make
an edit -> Download new provisioning
Worked for me. Now i'm able to use pus...
Jquery .on() submit event
...my submit function was missing the "return" statement.
For example:
$("#id_form").on("submit", function(){
//Code: Action (like ajax...)
return false;
})
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HTML/CSS: Making two floating divs the same height
... below. Basically, I want to have two divs take up 100% of the available width, but only take up as much vertical space as needed (which isn't really that obvious from the picture). The two should at all times have the exact same height with a little line between them, as shown.
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Multiple models in a view
... using something like firebug (on firefox) and you will see something like id="LoginViewModel_Email" name = "LoginViewModel.Email", so in actual fact they are unique! A view model should be what you need, just post each page to a different URL and you should be fine
– Haroon
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dpi value of default “large”, “medium” and “small” text views android
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See in the android sdk directory.
In \platforms\android-X\data\res\values\themes.xml:
<item name="textAppearanceLarge">@android:style/TextAppearance.Large</item>
<item name="textAppearanceMedium">@android:style/Te...