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Aggregate / summarize multiple variables per group (e.g. sum, mean)
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The recast function (also from reshape2) integrates the melt and dcast function in one go for tasks like this: recast(df1, year + month ~ variable, sum, id.var = c("date", "year", "month"))
– Jaap
May 13 '16 at 6:17
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jQuery set checkbox checked
I already tried all the possible ways, but I still didn't get it working.
I have a modal window with a checkbox I want that when the modal opens, the checkbox check or uncheck should be based on a database value. (I have that already working with others form fields.) I started trying to get it c...
Rails - controller action name to string
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Or 'controller.action_name' in Rails 3.0. This is the best way to access the action name in the view.
– emk
Feb 1 '11 at 19:59
2
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...ostinfo['first']}-->
<input name="subject" type="hidden" value="" />
<!--{else}-->
<!--{if $_GET[action] != 'reply'}-->
<span><input type="text" name="subject" id="subject" class="px" value="$postinfo...
Changing the image source using jQuery
...e of the common mistakes people do when change the image source is not waiting for image load to do afterward actions like maturing image size etc.
You will need to use jQuery .load() method to do stuff after image load.
$('yourimageselector').attr('src', 'newsrc').load(function(){
this.width; ...
Get filename and path from URI from mediastore
I have an onActivityResult returning from an mediastore image selection which I can get a URI for an image using the following:
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How would you make two s overlap?
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I might approach it like so (CSS and HTML):
html,
body {
margin: 0px;
}
#logo {
position: absolute; /* Reposition logo from the natural layout */
left: 75px;
top: 0px;
width: 300px;
height: 200px;
z-index: 2;
}
#content {
margin-top: 100px; /* Provide buffer fo...
How to clear an ImageView in Android?
I am reusing ImageView s for my displays, but at some point I don't have values to put it.
17 Answers
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How to focus on a form input text field on page load using jQuery?
...s probably very simple, but could somebody tell me how to get the cursor blinking on a text box on page load?
11 Answers
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Creating an Android trial application that expires after a fixed time period
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Currently most developers accomplish this using one of the following 3 techniques.
The first approach is easily circumvented, the first time you run the app save the date/time to a file, database, or shared preferences and every time you run the app after that check t...