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How can I rename a database column in a Ruby on Rails migration?
I wrongly named a column hased_password instead of hashed_password .
26 Answers
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Where is shared_ptr?
...ted. None of the examples I see show complete code to include the headers for shared_ptr (and working). Simply stating std , tr1 and <memory> is not helping at all! I have downloaded boosts and all but still it doesn't show up! Can someone help me by telling exactly where to find it?
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Cancel a UIView animation?
Is it possible to cancel a UIView animation while it is in progress? Or would I have to drop to the CA level?
17 Answers
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dd: How to calculate optimal blocksize? [closed]
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The optimal block size depends on various factors, including the operating system (and its version), and the various hardware buses and disks involved. Several Unix-like systems (including Linux and at least some flavors of BSD) define the st_blksize member in the struct...
How do I check if file exists in Makefile so I can delete it?
... clean section of my Makefile I am trying to check if the file exists before deleting permanently. I use this code but I receive errors.
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Git: how to reverse-merge a commit?
... want to do that if you have already pushed your commits to another repository (or someone else has pulled from you).
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Windows equivalent to UNIX pwd
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This prints it in the console:
echo %cd%
or paste this command in CMD, then you'll have pwd:
(echo @echo off
echo echo ^%cd^%) > C:\WINDOWS\pwd.bat
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How to set target hosts in Fabric file
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I do this by declaring an actual function for each environment. For example:
def test():
env.user = 'testuser'
env.hosts = ['test.server.com']
def prod():
env.user = 'produser'
env.hosts = ['prod.server.com']
def deploy():
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Using the above ...
Why does Lua have no “continue” statement?
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In Lua 5.2 the best workaround is to use goto:
-- prints odd numbers in [|1,10|]
for i=1,10 do
if i % 2 == 0 then goto continue end
print(i)
::continue::
end
This is supported in LuaJIT since version 2.0.1
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Setting a timeout for socket operations
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Use the Socket() constructor, and connect(SocketAddress endpoint, int timeout) method instead.
In your case it would look something like:
Socket socket = new Socket();
socket.connect(new InetSocketAddress(ipAddress, port), 1000);
Quoting from th...