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Installing older version of R package
...am trying to use Rpy2 and ggplot2 but I get an error. After some searching for the error online, I found that the error occurs because there are changes in the ggplot2 package that are not yet reflected in Rpy2 (for example, see this post (Edit: Link is now dead)).
...
How to drop column with constraint?
...offers drop column checkin
But the error may appear from other reasons - for example the user defined function or view with SCHEMABINDING option set for them.
UPD:
Completely automated dropping of constraints script:
DECLARE @sql NVARCHAR(MAX)
WHILE 1=1
BEGIN
SELECT TOP 1 @sql = N'alter tabl...
What's the difference between SortedList and SortedDictionary?
...
Yes - their performance characteristics differ significantly. It would probably be better to call them SortedList and SortedTree as that reflects the implementation more closely.
Look at the MSDN docs for each of them (SortedList, SortedDi...
How do I analyze a program's core dump file with GDB when it has command-line parameters?
... crash scenario is shown in GDB (checked with GDB version 7.1 on Ubuntu).
For example:
$ ./crash -p param1 -o param2
Segmentation fault (core dumped)
$ gdb ./crash core
GNU gdb (GDB) 7.1-ubuntu
...
Core was generated by `./crash -p param1 -o param2'. <<<<< See this line shows crash ...
SQL Add foreign key to existing column
...sing the following SQL command in SQL Server 2008 to update a table with a foreign key constraint:
6 Answers
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ElasticSearch: Unassigned Shards, how to fix?
...if you've disabled shard allocation (perhaps you did a rolling restart and forgot to re-enable it), you can re-enable shard allocation.
# v0.90.x and earlier
curl -XPUT 'localhost:9200/_settings' -d '{
"index.routing.allocation.disable_allocation": false
}'
# v1.0+
curl -XPUT 'localhost:9200/_...
“Too many values to unpack” Exception
... tuple has too many values with respect to the number of target variables. For example: this work, and prints 1, then 2, then 3
def returnATupleWithThreeValues():
return (1,2,3)
a,b,c = returnATupleWithThreeValues()
print a
print b
print c
But this raises your error
def returnATupleWithThree...
Python multiprocessing pool.map for multiple arguments
...nswer to this is version- and situation-dependent. The most general answer for recent versions of Python (since 3.3) was first described below by J.F. Sebastian.1 It uses the Pool.starmap method, which accepts a sequence of argument tuples. It then automatically unpacks the arguments from each tuple...
Calculate difference in keys contained in two Python dictionaries
...elf.set_past - self.intersect
def changed(self):
return set(o for o in self.intersect if self.past_dict[o] != self.current_dict[o])
def unchanged(self):
return set(o for o in self.intersect if self.past_dict[o] == self.current_dict[o])
Here is some sample output:
>>...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
How can I transform between the two styles of public key format,
one format is:
5 Answers
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