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Mechanisms for tracking DB schema changes [closed]
...ch the changes are applied and a "down" method in which the changes are undone. A single command brings the database up to date, and can also be used to bring the database to a specific version of the schema. In Rails, migrations are kept in their own directory in the project directory and get check...
IPN vs PDT in Paypal
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Implement both and get the best of both worlds. But if you're only doing one, IPN is the reliable one.
One catch: if you implement both then there's a chance your payments could be processed twice. Take care to ensure that doesn't happen. The application I wrote handles the PDT and IPN almost i...
Why does Lua have no “continue” statement?
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I hope they include an actual continue one day. The goto replacement doesn't look very nice and needs more lines. Also, wouldn't that create trouble if you had more than one loop doing this in one function, both with ::continue::? Making up a name per loop doesn't...
Drop data frame columns by name
...inted with the drop argument of the indexing function, if you want to keep one column as a data frame, you do:
keeps <- "y"
DF[ , keeps, drop = FALSE]
drop=TRUE (or not mentioning it) will drop unnecessary dimensions, and hence return a vector with the values of column y.
...
case-insensitive list sorting, without lowercasing the result?
...string, so in Python 3 you should do the sane thing and only sort lists of one type of string.
>>> lst = ['Aden', u'abe1']
>>> sorted(lst)
['Aden', u'abe1']
>>> sorted(lst, key=lambda s: s.lower())
[u'abe1', 'Aden']
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Squash my last X commits together using Git
How can I squash my last X commits together into one commit using Git?
35 Answers
35
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How do I test an AngularJS service with Jasmine?
...describe('myService test', function(){
describe('when I call myService.one', function(){
it('returns 1', function(){
var $injector = angular.injector([ 'myModule' ]);
var myService = $injector.get( 'myService' );
expect( myService.one ).toEqual(1);
...
Easiest way to split a string on newlines in .NET?
... theText.Split(
new[] { Environment.NewLine },
StringSplitOptions.None
);
Edit:
If you want to handle different types of line breaks in a text, you can use the ability to match more than one string. This will correctly split on either type of line break, and preserve empty lines and spacin...
How to find if a given key exists in a C++ std::map
...ere is only a single key in a std::map. So count will either be 0 or 1. Is one more efficient than the other?
– goelakash
Jul 17 '15 at 7:38
37
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How to modify list entries during for loop?
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@Navin: Because a[i] = s.strip() only does one indexing operation.
– martineau
Sep 5 '17 at 19:03
1
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