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How do you delete an ActiveRecord object?
...like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition: ...
In PHP what does it mean by a function being binary-safe?
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106
It means the function will work correctly when you pass it arbitrary binary data (i.e. strings ...
How to find Array length inside the Handlebar templates?
...;
{{/each}}
</ul>
Would yield:
<ul>
<li>apple 0 3</li>
<li>orange 1 3</li>
<li>banana 2 3</li>
</ul>
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Determine installed PowerShell version
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+50
Use $PSVersionTable.PSVersion to determine the engine version. If the variable does not exist, it is safe to assume the engine is vers...
How to print a list of symbols exported from a dynamic library
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man 1 nm
https://web.archive.org/web/20160316222941/https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/nm.1.html
For example:
nm -gU /usr/local/Cellar/cairo/1.12.16/lib/cairo/libcairo-trace.0.dylib
...
Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
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piggybackpiggyback
7,9641010 gold badges4242 silver badges7474 bronze badges
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Best content type to serve JSONP?
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answered Sep 21 '08 at 16:06
John MillikinJohn Millikin
178k3636 gold badges199199 silver badges215215 bronze badges
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How to compare two dates?
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505
Use the datetime method and the operator < and its kin.
>>> from datetime import d...
git update-index --assume-unchanged on directory
...roblematic. If you have those, you can use this:
git ls-files -z | xargs -0 git update-index --assume-unchanged
Edit: incorporated input from @MatthewScharley regarding git ls-files -z.
Windows Commands
Note: If you're on windows, use Git Bash to run these commands
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Add EBS to Ubuntu EC2 Instance
... (with update to /etc/fstab so it stays mounted on reboot):
sudo mkdir -m 000 /vol
echo "/dev/xvdf /vol auto noatime 0 0" | sudo tee -a /etc/fstab
sudo mount /vol
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