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Assign multiple columns using := in data.table, by group
What is the best way to assign to multiple columns using data.table ? For example:
2 Answers
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Resync git repo with new .gitignore file
...r --cached .
# add all files as per new .gitignore
git add .
# now, commit for new .gitignore to apply
git commit -m ".gitignore is now working"
(make sure to commit first your changes you want to keep, to avoid any incident as jball037 comments below.
The --cached option will keep your files untou...
What is the recommended batch size for SqlBulkCopy?
What is the recommended batch size for SqlBulkCopy ? I'm looking for a general formula I can use as a starting point for performance tuning.
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Adding code to a javascript function programmatically
...without copying and pasting the whole thing into the second JS file.
So for example, the off limits JS might have a function like this:
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Django: Why do some model fields clash with each other?
I want to create an object that contains 2 links to Users. For example:
6 Answers
6
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Inherit docstrings in Python class inheritance
...'d like each class and inherited class to have good docstrings. So I think for the inherited class, I'd like it to:
5 Answe...
Install MySQL on Ubuntu without a password prompt
...sword_again password your_password'
sudo apt-get -y install mysql-server
For specific versions, such as mysql-server-5.6, you'll need to specify the version in like this:
sudo debconf-set-selections <<< 'mysql-server-5.6 mysql-server/root_password password your_password'
sudo debconf-set...
How do I download a tarball from GitHub using cURL?
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For https, you'll also likely need -k.
– nicerobot
Dec 29 '11 at 0:41
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How can I keep my branch up to date with master with git?
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Alternatives to java.lang.reflect.Proxy for creating proxies of abstract classes (rather than interf
...act class.
You of course will have to code it, however it's quite simple. For creating your Proxy, you'll have to give him an InvocationHandler. You'll then only have to check the method type in the invoke(..) method of your invocation handler. But beware : you'll have to check the method type agai...