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ExecJS::RuntimeError on Windows trying to follow rubytutorial
... 2 was the accepted solution before actually finding information about the root issue we were having. The only reason we kept looking was that we couldn't believe the Rails team would (1) insert a line of code in every scaffold generated project that caused an issue, or (2) require that we install ...
Hibernate error - QuerySyntaxException: users is not mapped [from users]
...
Some Linux based MySQL installations require case sensitive. Work around is to apply nativeQuery.
@Query(value = 'select ID, CLUMN2, CLUMN3 FROM VENDOR c where c.ID = :ID', nativeQuery = true)
...
Ball to Ball Collision - Detection and Handling
...re and work with it that way. There's no reason for that expensive square root operation.
Also, once you have found a collision you have to continue to evaluate collisions until no more remain. The problem is that the first one might cause others that have to be resolved before you get an accurat...
EC2 Can't resize volume after increasing size
...s Change Everything"
The process works even if the volume to extend is the root volume of running instance!
Say we want to increase boot drive of Ubuntu from 8G up to 16G "on-the-fly".
step-1) login into AWS web console -> EBS -> right mouse click on the one you wish to resize -> "Modify ...
Alternative for PHP_excel
...
@RZB - You use whichever library works for you, though MySQL doesn't (as far as I'm aware) have any native import function for .xls files, only for .csv using LOAD DATA INFILE. As the developer of PHPExcel, I will certainly promote it and recommend it where appropriate, but I don...
.gitignore exclude files in directory but not certain directories
... .gitignore files in the folders you want to keep. You can put this in the root .gitignore as follows:
application/cache/*
application/cache/folder/*
application/cache/folder/onemorefolder/*
!*.gitkeep
Now just create and commit empty .gitkeep files into the directories as listed above. The folde...
No appenders could be found for logger(log4j)?
...ties (taken from the above mentioned guide) file to your classpath:
# Set root logger level to DEBUG and its only appender to A1.
log4j.rootLogger=DEBUG, A1
# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout.
log4j.appender.A1.layout=or...
How to remove unreferenced blobs from my git repo
...s/folders from your git repository. To use
# it, cd to your repository's root and then run the script with a list of paths
# you want to delete, e.g., git-delete-history path1 path2
if [ $# -eq 0 ]; then
exit 0
fi
# make sure we're at the root of git repo
if [ ! -d .git ]; then
echo "Err...
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
...ed for the validation set should be
inversely proportional to the square root of the number of free
adjustable parameters.
In their conclusion they specify a formula:
Validation set (v) to training set (t) size ratio, v/t, scales like
ln(N/h-max), where N is the number of families of rec...
Adding days to $Date in PHP
I have a date returned as part of a mySQL query in the form 2010-09-17
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