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Using Rails serialize to save hash to database
...wrong, :text
end
Then Rails will properly convert it into YAML for you (and perform proper serialization). Strings fields are limited in size and will only hold especially-small values.
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Showing the same file in both columns of a Sublime Text window
... -> New View Into File. You can then drag the new tab to the other pane and view the file twice.
There are several ways to create a new pane. As described in other answers, on Linux and Windows, you can use AltShift2 (Option ⌥Command ⌘2 on OS X), which corresponds to View → Layout → Colu...
Most tricky/useful commands for gdb debugger [closed]
Can you post your most tricky and useful commands while you run a debugger like gdb or dbx.
12 Answers
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How to execute more than one maven command in bat file?
...ean
call mvn package
Note that you don't need semicolons in batch files. And the reason why you need to use call is that mvn itself is a batch file and batch files need to call each other with call, otherwise control does not return to the caller.
If you want subsequent commands to echo to the co...
How to serialize an object into a string
I am able to serialize an object into a file and then restore it again as is shown in the next code snippet. I would like to serialize the object into a string and store into a database instead. Can anyone help me?
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How to calculate a logistic sigmoid function in Python?
...uld do it:
import math
def sigmoid(x):
return 1 / (1 + math.exp(-x))
And now you can test it by calling:
>>> sigmoid(0.458)
0.61253961344091512
Update: Note that the above was mainly intended as a straight one-to-one translation of the given expression into Python code. It is not t...
How to construct a timedelta object from a simple string
...thinking of some kind of function that could take anything you throw at it and still be able to handle converting to timedelta.
– priestc
Jan 7 '11 at 17:15
2
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How to pass the value of a variable to the stdin of a command?
...e somewhat secure i.e. does not pass secure data through parameters of commands and preferably does not use temporary files. How can I pass a variable to the stdin of a command? Or, if it's not possible, how to correctly use temporary files for such task?
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LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?
...umnA, t2.ColumnB }
...
You have to take advantage of anonymous types and compose a type for the multiple columns you wish to compare against.
This seems confusing at first but once you get acquainted with the way the SQL is composed from the expressions it will make a lot more sense, under th...
Setting the MySQL root user password on OS X
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Try the command FLUSH PRIVILEGES when you log into the MySQL terminal. If that doesn't work, try the following set of commands while in the MySQL terminal
$ mysql -u root
mysql> USE mysql;
mysql> UPDATE user SET password=PASSWORD...