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Finding ALL duplicate rows, including “elements with smaller subscripts”
...ment. The "Example" section of ?duplicated shows you how to use it. Just call duplicated twice, once with fromLast=FALSE and once with fromLast=TRUE and take the rows where either are TRUE.
Some late Edit:
You didn't provide a reproducible example, so here's an illustration kindly contributed ...
How do I fit an image (img) inside a div and keep the aspect ratio?
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onload won't be called when the image is cached in the browser, so this will only work when the image is loaded for the first time.
– Redtopia
Apr 27 '14 at 1:24
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How does this CSS produce a circle?
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How does a border of 180 pixels with height/width-> 0px become a circle with a radius of 180 pixels?
Let's reformulate that into two questions:
Where do width and height actually apply?
Let's have a look at the areas of a typical box (source):
The height and w...
How to alias a table in Laravel Eloquent queries (or using Query Builder)?
...users = DB::table('really_long_table_name AS t')
->select('t.id AS uid')
->get();
Let's see it in action with an awesome tinker tool
$ php artisan tinker
[1] > Schema::create('really_long_table_name', function($table) {$table->increments('id');});
// NULL
[2] &g...
Default function arguments in Rust
...ng the default value and the function coded only once (instead of in every call), but is of course a whole lot more to type out. The function call will look like add(None, None), which you may or may not like depending on your perspective.
If you see typing nothing in the argument list as the code...
How to check edittext's text is email address or not?
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/**
* method is used for checking valid email id format.
*
* @param email
* @return boolean true for valid false for invalid
*/
public static boolean isEmailValid(String email) {
String expression = "^[\\w\\.-]+@([\\w\\-]+\\.)+[A-Z]{2,4}$";
Pattern ...
Javascript Shorthand for getElementById
Is there any shorthand for the JavaScript document.getElementById? Or is there any way I can define one? It gets repetitive retyping that over and over .
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What's the proper value for a checked attribute of an HTML checkbox?
...ording to the spec here, the most correct version is:
<input name=name id=id type=checkbox checked=checked>
For HTML, you can also use the empty attribute syntax, checked="", or even simply checked (for stricter XHTML, this is not supported).
Effectively, however, most browsers will suppor...
Using SSH keys inside docker container
...d command
$ docker build -t example --build-arg ssh_prv_key="$(cat ~/.ssh/id_rsa)" --build-arg ssh_pub_key="$(cat ~/.ssh/id_rsa.pub)" --squash .
Dockerfile
FROM python:3.6-slim
ARG ssh_prv_key
ARG ssh_pub_key
RUN apt-get update && \
apt-get install -y \
git \
openss...
Javascript - Append HTML to container element without innerHTML
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@kennydelacruz: The OP didn't want to append new HTML to an existing HTML because it destroys and recreates the existing elements. The OP found a solution by creating a new element and append that but they didn't want to add an additional element. I...