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What optimizations can GHC be expected to perform reliably?
...Right x
As an extended example, take this definition of last:
last [] = error "last: empty list"
last (x:[]) = x
last (x:x2:xs) = last (x2:xs)
We first transform it to
last_nil = error "last: empty list"
last_cons x [] = x
last_cons x (x2:xs) = last (x2:xs)
{-# INLINE last #-}
last [] = last_...
Java Reflection: How to get the name of a variable?
... answered Mar 19 '12 at 20:27
error_null_pointererror_null_pointer
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What is a Python equivalent of PHP's var_dump()? [duplicate]
...ort.
– Paul Biggar
Dec 21 '09 at 18:05
yep, var_export in php and repr in python are somewhat related - that's if you ...
Delete all records in a table of MYSQL in phpMyAdmin
...raint in the table then those record will not be deleted and will give the error.
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Difference between `set`, `setq`, and `setf` in Common Lisp?
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(set ls '(1 2 3 4)) => Error - ls has no value
(set 'ls '(1 2 3 4)) => OK
(setq ls '(1 2 3 4)) => OK - make ls to (quote ls) and then have the usual set
(setf ls '(1 2 3 4)) => OK - same as setq so far BUT
(setf (car ls) 10) => Make...
Assign null to a SqlParameter
The following code gives an error - "No implicit conversion from DBnull to int."
18 Answers
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Swift Beta performance: sorting arrays
I was implementing an algorithm in Swift Beta and noticed that the performance was very poor. After digging deeper I realized that one of the bottlenecks was something as simple as sorting arrays. The relevant part is here:
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Using jQuery To Get Size of Viewport
...unction() {
if(typeof $=='undefined') {
alert("PROGRAMMER'S Error: you haven't called JQuery library");
} else if (typeof $.ui=='undefined') {
alert("PROGRAMMER'S Error: you haven't installed the UI Jquery library");
}
if(document.doctype==null || screen.heig...
Sorting a vector of custom objects
...ut sorting a vector containing custom (i.e. user defined) objects.
Probably, standard STL algorithm sort along with a predicate (a function or a function object) which would operate on one of the fields (as a key for sorting) in the custom object should be used.
Am I on the right track?
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