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Access denied for user 'root@localhost' (using password:NO)
... @Bozho - I follow the instruction aand create a text file and call it from the mentioned command, after that I face with 100608 [warning] --default-character-set is deprecated and will be removed in a future release. please use --character-set-server instead .----------------------------...
Changing MongoDB data store directory
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The short answer is that the --dbpath parameter in MongoDB will allow you to control what directory MongoDB reads and writes it's data from.
mongod --dbpath /usr/local/mongodb-data
Would start mongodb and put the files in /usr/local/mongodb-data.
Depending on your distribution and...
What's the use of session.flush() in Hibernate
...hanges to the database). By default, Hibernate will flush changes automatically for you:
before some query executions
when a transaction is committed
Allowing to explicitly flush the Session gives finer control that may be required in some circumstances (to get an ID assigned, to control the si...
Is it fine to have foreign key as primary key?
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Foreign keys are almost always "Allow Duplicates," which would make them unsuitable as Primary Keys.
Instead, find a field that uniquely identifies each record in the table, or add a new field (either an auto-incrementing integer or a GUID) to act as the p...
How can I return to a parent activity correctly?
...ent to it.
Therefore, the system is forced to recreate activity A (i.e. calling onCreate) even if the task stack is handled correctly.
To fix this problem you need to change the manifest, adding the following attribute to the A activity declaration:
android:launchMode="singleTop"
Note: calling...
How to view the assembly behind the code using Visual C++?
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There are several approaches:
You can normally see assembly code while debugging C++ in visual studio (and eclipse too). For this in Visual Studio put a breakpoint on code in question and when debugger hits it rigth click and find "Go To Assembly" ( or press CTRL+ALT...
String.replaceAll without RegEx
I'd like to replace all instances of a substring in a string but String.replaceAll() only accepts a pattern. The string that I have came from a previous match. Is it possible to add escapes to the pattern that I have or is there a version of replaceAll() in another class which accepts a literal ...
Java 8: Lambda-Streams, Filter by Method with Exception
I have a problem trying out the Lambda expressions of Java 8.
Usually it works fine, but now I have methods that throw IOException 's.
It's best if you look at the following code:
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How to clone git repository with specific revision/changeset?
How can I clone git repository with specific revision, something like I usually do in Mercurial:
15 Answers
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Transpose a data frame
...You'd better not transpose the data.frame while the name column is in it - all numeric values will then be turned into strings!
Here's a solution that keeps numbers as numbers:
# first remember the names
n <- df.aree$name
# transpose all but the first column (name)
df.aree <- as.data.frame(...