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What is the purpose of the reader monad?
...a -> Reader env a
Okay, so Haskell and other functional languages are based on the lambda calculus. Lambda calculus has a syntax that looks like
data Term = Apply Term Term | Lambda String Term | Var Term deriving (Show)
and we want to write an evaluator for this language. To do so, we wil...
How to reset sequence in postgres and fill id column with new data?
...ich explains the ALTER SEQUENCE command ... so I changed 'seq' by mytable_id_seq where 'mytable' is my table name and 'id' is the name of my serial column
– Javi
May 4 at 9:19
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Ways to circumvent the same-origin policy
...P comes to mind:
JSONP or "JSON with padding" is a
complement to the base JSON data
format, a usage pattern that allows a
page to request and more meaningfully
use JSON from a server other than the
primary server. JSONP is an
alternative to a more recent method
called Cross-Origin ...
Trim spaces from end of a NSString
...opy];
//pass it by reference to CFStringTrimSpace
CFStringTrimWhiteSpace((__bridge CFMutableStringRef) stringToTrim);
//stringToTrim is now "i needz trim"
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How can I build multiple submit buttons django form?
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Security Risk! Using form data to make changes in the database before the form has been validated is dangerous.
– Quant Metropolis
Mar 14 '16 at 16:39
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How do I get the information from a meta tag with JavaScript?
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To get it working with OG tags add quotes to it like this_: var title = document.head.querySelector('[property="og:title"]');
– arpo
May 8 '17 at 8:21
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What is the equivalent of 'describe table' in SQL Server?
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You can use the sp_columns stored procedure:
exec sp_columns MyTable
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Switching to landscape mode in Android Emulator
...h to previous layout orientation (for example, portrait, landscape):
KEYPAD_7, Ctrl + F11
Switch to next layout orientation (for example, portrait, landscape):
KEYPAD_9, Ctrl + F12
From docs.
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Regex, every non-alphanumeric character except white space or colon
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No alphanumeric, white space or '_'.
var reg = /[^\w\s)]|[_]/g;
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split string only on first instance - java
...first instance only. How can I do that ? Here is a JavaScript example for '_' char but it doesn't work for me
split string only on first instance of specified character
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