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Fully custom validation error message with Rails
Using Rails I'm trying to get an error message like "The song field can't be empty" on save. Doing the following:
17 Answer...
Use Expect in a Bash script to provide a password to an SSH command
...ple.com; interact }'
This will wait for Enter and then return to (for a moment) the interactive session.
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Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
I need to write a shell script for this. Can someone suggest how to begin?
8 Answers
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What is the naming convention in Python for variable and function names?
Coming from a C# background the naming convention for variables and method names are usually either camelCase or PascalCase:
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How to Sort a List by a property in the object
... note that this creates a whole new list with all the items in memory, which may be problematic in terms of performance.
– staafl
Oct 19 '13 at 19:25
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What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
...erence in performance. Final version prepared by SQL Server would be the same in both the cases.
– Sateesh Pagolu
Feb 27 '15 at 0:31
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How to get number of entries in a Lua table?
Sounds like a "let me google it for you" question, but somehow I can't find an answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
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How to handle back button in activity
How to handle a back button in an activity? I have some buttons. If I click one of the button it's redirecting to the buttons which I required. It's working fine but When I press back button it gets finished.
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NumPy array initialization (fill with identical values)
I need to create a NumPy array of length n , each element of which is v .
7 Answers
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How to change a nullable column to not nullable in a Rails migration?
...ere are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
8 Answers
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