sort out the notes from a year ago, and see a piece of code: (>=>) :: Monad m => (a -> m b) -> (b -> m c) -> (a -> m c) f >=> g = x -> f x >>= g is just written differently ( > = > and @ > ). ther...
suppose I have an integer x , and I want to judge whether the integer is in the interval [1, limit] . In Haskell, I can think of two schemes: x > = 1 and x < = limit elem x [1..limit] I used the Profiling, code of GCI as follows: I w...
here is a multi-dimensional json data, which can be converted into an array of php through json_decode. How to traverse the news headlines? https: www.baidu.com s?wd=. ...
configindex.js api axios ...
like this ...
I want to have a function that is output when it is executed separately, but returns the output when called by other functions, but does not output for example, code similar to the following when directly executed: def foo: print 111 but it is exe...
$items = array( 1 => array( id => 1, pid => 0, name => ), 2 => array( id => 2, pid => 0, name => ), 3 => array( id => 3, pid => 1, name =&g...