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How to use "BinaryString.uncons()" but with a type distinct from Word8?


By : tommyboywonder
Date : August 02 2020, 08:00 AM
Does that help There are many deserialization libraries available. For one that sounds like it is a particularly close match to your mental model, check out binary's Get. It is not really in scope to give a Big List of all the available ones, but a quick search on Hackage should give you many other choices to consider.
code :


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Explaination of "warning: assignment from distinct Objective-C type"


By : Sloan
Date : March 29 2020, 07:55 AM
I wish this help you The stringByReplacingOccurrencesOfString:withString: method is declared to return an NSString*, not an NSMutableString*. Basically, in the assignment, you're assigning an NSString* to a variable of type NSMutableString* which is not necessarily safe (note that NSMutableString inherits NSString, not the other way around).

"takeWhile (<= (maxBound :: Word8)) primes" hangs


By : user7401740
Date : March 29 2020, 07:55 AM
To fix the issue you can do Your problem is quite interesting, but it's not in takeWhile; it's in primes:
Since primes is able to return whatever type you want, its implementation probably silently uses that type internally. So, when you ask it to return Word8 primes, it fails internally:
code :
λ take 20 (primes :: [Word8])
[2,3,5,7,11,13,17,19,23,25,29,31,35,37,41,43,47,49,53,55]

"CAST" function with "DISTINCT ON" not changing the type of the field


By : Diana P
Date : March 29 2020, 07:55 AM
it should still fix some issue I have two tables parent and child . I need to join these two tables and get the results into one. This pid(one column in parent table) may have duplicate entries and the field type of pid is VARCHAR. But the field type of 'cid' in the child table is INTEGER. ,
DISTINCT ON (CAST(pid AS INTEGER)) pid AS id
code :
SELECT DISTINCT ON (pid) pid::INTEGER AS id,
...

UNION

SELECT cid,
...

Having trouble understanding how this piece of code works "binaryString[i] = ((number & 1) + '0')"


By : user2671382
Date : March 29 2020, 07:55 AM
hope this fix your issue Let's break binaryString[i] = ((number & 1) + '0') down, piece by piece:
first, we'll look at (number & 1). This checks if the least significant bit in number is a 1 or not. If it is, this expression evaluates to 1, otherwise it evaluates to 0.

data structure that can do a "select distinct X where W=w and Y=y and Z=z and ..." type lookup


By : 김우현
Date : March 29 2020, 07:55 AM
Does that help Since you are asking for a SQL-like query, how about using a relational database? SQLite is part of the standard library, and can be used either on-disk or fully in memory.
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