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How to rename a single column in a data.frame?
...set the second column's name. Your object only has one column, so the command throws an error. This should be sufficient:
colnames(trSamp) <- "newname2"
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How to select rows that have current day's timestamp?
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use DATE and CURDATE()
SELECT * FROM `table` WHERE DATE(`timestamp`) = CURDATE()
I guess using DATE still uses INDEX.
see the execution plan on the DEMO
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How to format Joda-Time DateTime to only mm/dd/yyyy?
...users are advised to migrate. For the JAVA SE ≥ 8 way of formatting date and time, see below.
Joda time
Create a DateTimeFormatter using DateTimeFormat.forPattern(String)
Using Joda time you would do it like this:
String dateTime = "11/15/2013 08:00:00";
// Format for input
DateTimeFormatter dtf =...
pass post data with window.location.href
... POST data to the new page I'm opening. is this possible using JavaScript and jQuery?
8 Answers
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Multiple submit buttons in an HTML form
Let's say you create a wizard in an HTML form. One button goes back, and one goes forward. Since the back button appears first in the markup when you press Enter , it will use that button to submit the form.
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Why is it recommended to have empty line in the end of a source file?
Some code style tools recommend this and I remember seeing some unix command line tools warning about missing empty line.
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GetProperties() to return all properties for an interface inheritance hierarchy
...el's example code into a useful extension method encapsulates both classes and interfaces. It also add's the interface properties first which I believe is the expected behaviour.
public static PropertyInfo[] GetPublicProperties(this Type type)
{
if (type.IsInterface)
{
var propertyI...
Get a list of resources from classpath directory
.... It's as if the designers didn't really anticipate this use of resources, and there is only a partial implementation. Even if it works on some JDKs or environments, this doesn't seem to be documented behaviour.
– Kevin Boone
Sep 18 '17 at 7:21
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Similarity String Comparison in Java
I want to compare several strings to each other, and find the ones that are the most similar. I was wondering if there is any library, method or best practice that would return me which strings are more similar to other strings. For example:
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Make Div overlay ENTIRE page (not just viewport)?
...verlay div cover the ENTIRE page... NOT just the viewport. I don't understand why this is so hard to do... I've tried setting body, html heights to 100% etc but that isn't working. Here is what I have so far:
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