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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...re allowed (e.g. changing order of elements of each vector, changing order and names of variables, shortening variables, changing case of strings). From this, you should be able to figure out what was missing from one or the other. For example (this is not very elegant):
difference <-
data.fr...
Select last N rows from MySQL
...T 50
) sub
ORDER BY id ASC
This will select the last 50 rows from table, and then order them in ascending order.
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Make a link in the Android browser start up my app?
... scheme. Something along the lines of:
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABL...
Practical uses of git reset --soft?
...
git reset is all about moving HEAD, and generally the branch ref.
Question: what about the working tree and index?
When employed with --soft, moves HEAD, most often updating the branch ref, and only the HEAD.
This differ from commit --amend as:
it doesn't cre...
What are OLTP and OLAP. What is the difference between them?
... them don't give me an idea, or my knowledge is too insufficient to understand it.
5 Answers
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How to find out which fonts are referenced and which are embedded in a PDF document
...I'd like to inspect, which fonts are actually embedded in the pdf document and which are only referenced. Is there an easy (and cheap as in free) way to do that?
...
Do you need to close meta and link tags in HTML?
I was just reading somebody's HTML who never closed meta and link tags in the HTML head section. The code worked fine; is closing these tags optional?
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Stop Excel from automatically converting certain text values to dates
...Excel 2007 bug noted by Jeffiekins one should use the solution proposed by Andrew: "=""2008-10-03"""
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How to round a number to n decimal places in Java
... to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
...
Properties order in Margin
...s also possible to specify just two sizes like this:
Margin="1,2"
Left AND right
Top AND bottom
Finally you can specify a single size:
Margin="1"
used for all sides
The order is the same as in WinForms.
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