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What does “coalgebra” mean in the context of programming?
...= mappend (a, b)
op (Right ()) = mempty
We can actually use this transformation repeatedly to combine all the τⁿ → τ functions into a single one, for any algebra. (In fact, we can do this for any number of functions a → τ, b → τ and so on for any a, b,….)
This lets us talk about ...
How to loop through a HashMap in JSP?
...t;c:forEach items="${partnerTypesMap}" var="partnerTypesMap">
<form:option value="${partnerTypesMap['value']}">${partnerTypesMap['key']}</form:option>
</c:forEach>
share
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SQLite - UPSERT *not* INSERT or REPLACE
...author
FROM new LEFT JOIN page AS old ON new.name = old.name;
The exact form of this query can vary a bit. The key is the use of INSERT SELECT with a left outer join, to join an existing row to the new values.
Here, if a row did not previously exist, old.id will be NULL and SQLite will then assi...
Android Shared preferences for creating one time activity (example) [closed]
I have three activities A,B and C where A and B are forms and after filling and saving the form data in database(SQLITE). I am using intent from A to B and then B to C.What i want is that every time I open my app I want C as my home screen and not A and B anymore.
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Is it safe to delete a void pointer?
...
It depends on "safe." It will usually work because information is stored along with the pointer about the allocation itself, so the deallocator can return it to the right place. In this sense it is "safe" as long as your allocator uses internal boundary tags. (Many do.)
How...
What is JavaScript garbage collection?
...icle should be considered "for historical purposes only". But it's still informative.
– Peter Ivan
Sep 17 '12 at 14:23
2
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git stash changes apply to new branch?
...stash push" in that it cannot take pathspecs, and any non-option arguments form the message.
– randomcontrol
Jan 2 at 12:39
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show 2 more co...
What is the correct value for the disabled attribute?
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HTML5 spec:
http://www.w3.org/TR/html5/forms.html#enabling-and-disabling-form-controls:-the-disabled-attribute :
The checked content attribute is a boolean attribute
http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes :
The presence of a boolean a...
A better similarity ranking algorithm for variable length strings
...ist(range(len(s) - 1))]
def string_similarity(str1, str2):
"""
Perform bigram comparison between two strings
and return a percentage match in decimal form.
"""
pairs1 = get_bigrams(str1)
pairs2 = get_bigrams(str2)
union = len(pairs1) + len(pairs2)
hit_count = 0
...
What's the difference between jQuery's replaceWith() and html()?
...ement, I was expecting it to return the new one with code like this: var $form = $target.closest('tr').replaceWith(html) It turns out $form contains the element before replacement. sigh
– Pawel Krakowiak
Jul 3 '12 at 11:34
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