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Changing column names of a data frame
I have a data frame called "newprice" (see below) and I want to change the column names in my program in R.
16 Answers
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How to implement a property in an interface
... there is no code. You just specify that there is a property with a getter and a setter, whatever they will do.
In the class, you actually implement them. The shortest way to do this is using this { get; set; } syntax. The compiler will create a field and generate the getter and setter implementati...
How to run a class from Jar which is not the Main-Class in its Manifest file
...e to run each one of those as per the need. I am trying to run it from command-line on Linux box.
7 Answers
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How best to determine if an argument is not sent to the JavaScript function
...ed' if one is paranoid (see comments).
Using the || operator has become standard practice - all the cool kids do it - but be careful: The default value will be triggered if the argument evaluates to false, which means it might actually be undefined, null, false, 0, '' (or anything else for which Bo...
Runtime vs. Compile time
What is the difference between run-time and compile-time?
28 Answers
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How to use ConcurrentLinkedQueue?
...o I just have to define two methods (one to retrive elements from the list and another to add elements to the list)?
Note: obviously these two methods have to be synchronized. Right?
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Allowed characters in Linux environment variable names
...llowed in Linux environment variable names? My cursory search of man pages and the web did only produce information about how to work with variables, but not which names are allowed.
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How to apply CSS to iframe?
...s set.
There are two different things here: the style of the iframe block and the style of the page embedded in the iframe. You can set the style of the iframe block the usual way:
<iframe name="iframe1" id="iframe1" src="empty.htm"
frameborder="0" border="0" cellspacing="0"
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Repository Pattern vs DAL
...the same thing? Just finished to watch Rob Connery's Storefront tutorial and they seem to be similar techinques. I mean, when I implement a DAL object I have the GetStuff, Add/Delete etc methods and I always write the interface first so that I can switch db later.
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How to quietly remove a directory with content in PowerShell
... really want to clear out only files of all folders you can list all leafs and pipe it to the Remove-Item cmdlet Get-ChildItem -Recurse -File | Remove-Item
– Michael Kargl
Jun 1 '19 at 11:32
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