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Multi-line commands in GHCi
...he following is sufficient:
Prelude> let addTwo x y = x + y
If you really want a definition with a type signature, or your definition spans over multiple lines, you can do this in ghci:
Prelude> :{
Prelude| let addTwo :: Int -> Int -> Int
Prelude| addTwo x y = x + y
Prelude| :}
...
Alter MySQL table to add comments on columns
...he output of a SHOW CREATE TABLE statement. This protects you from accidentally losing an important part of your column definition by not realising that you need to include it in your MODIFY or CHANGE clause. For example, if you MODIFY an AUTO_INCREMENT column, you need to explicitly specify the AUT...
Logback to log different messages to two files
...instances which each log to a separate file; one for analytics and one for all purpose logging. Does anyone know if this is possible with Logback, or any other logger for that matter?
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When should iteritems() be used instead of items()?
Is it legitimate to use items() instead of iteritems() in all places? Why was iteritems() removed from Python 3? Seems like a terrific and useful method. What's the reasoning behind it?
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How to increase the maximum number of opened editors in IntelliJ?
... files limit if you are using the Recent Files (Cmd+E) feature.
Works for all IntelliJ IDEA platform based IDEs.
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How can you integrate a custom file browser/uploader with CKEditor?
...ITOR.replace('content', {
filebrowserBrowseUrl : '/browser/browse/type/all',
filebrowserUploadUrl : '/browser/upload/type/all',
filebrowserImageBrowseUrl : '/browser/browse/type/image',
filebrowserImageUploadUrl : '/browser/upload/type/image',
filebrowserWindowWidth : 800,
fileb...
How to check if a column exists in Pandas
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To check if one or more columns all exist, you can use set.issubset, as in:
if set(['A','C']).issubset(df.columns):
df['sum'] = df['A'] + df['C']
As @brianpck points out in a comment, set([]) can alternatively be constructed with curly...
Best way to make Django's login_required the default
...p, the vast majority of which requires a login to access. This means that all throughout our app we've sprinkled:
9 Answer...
vim repeat find next character 'x'
... and ;), to a different character than the repetition of an edit (.). This allows you to do fast searches and changes to the search results. If you want to replace some + in a line with * you could do something like this (skipping some characters and replacing others): f+r*;.;;.;.;;;.
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How to access outer class from an inner class?
...d Jan 7 '10 at 23:54
Daniel VassalloDaniel Vassallo
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