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Rails migrations: self.up and self.down versus change
Looks like the new rails version has "change" versus self.up and self.down m>me m>thods.
3 Answers
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Is there any way to view the currently mapped keys in Vim?
Basically, I'd like to view all of the keys maps made in the current buffer by all of plugins, vimrc, etc, in the current buffer. Is there anyway to do this?
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Git: How to return from 'detached HEAD' state
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If you rem>me m>mber which branch was checked out before (e.g. master) you could simply
git checkout master
to get out of detached HEAD state.
Generally speaking: git checkout <branchnam>me m>> will get you out of that.
If you don't ...
How to list records with date from the last 10 days?
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Yes this does work in PostgreSQL (assuming the column "date" is of datatype date)
Why don't you just try it?
The standard ANSI SQL format would be:
SELECT Table.date
FROM Table
WHERE date > current_date - interval '10' day;
I prefer that format as it ma...
Mocking a class: Mock() or patch()?
I am using mock with Python and was wondering which of those two approaches is better (read: more pythonic).
2 Answers
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What is `params.require(:person).permit(:nam>me m>, :age)` doing in Rails 4?
All the examples of strong param>me m>ters in Rails 4 docs use
2 Answers
2
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Check if value already exists within list of dictionaries?
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Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
The part in parentheses is a generator expression that returns True for each dictionary that has the key-value pair you are looking for, otherwise False.
If the key co...
How do you specify a different port number in SQL Managem>me m>nt Studio?
I am trying to connect to a Microsoft SQL 2005 server which is not on port 1433. How do I indicate a different port number when connecting to the server using SQL Managem>me m>nt Studio?
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How can I find out if I have Xcode commandline tools installed?
...r/bin/xcodebuild -version
will give you the xcode version, run it via Terminal command
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How should I copy Strings in Java?
...le still contains the original value "hello" (this is because of String's immutability right?).
5 Answers
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