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...
function loadImageAsync(url) { return new Promise(function(resolve, reject) { throw new Error( BUG FOREVER ) const image = new Image(); image.onload = function() { resolve(image); }; image.o...
< keep-alive: max= "30 " > <template v-if="tab.name===activeName"> <component v-bind:is="currentTabComponent" v-bind="currentTabComponent.defaults">< component> &l...
the difference between react and jquery manipulating dom, and why jquery is not recommended in the react framework ...
1.notify_url :http: payCenter payFinish :http: ip:port payCenter payFinish 2. Local private network traversal is used. The notification address is as above everything is normal. After successful payment, you can receive the callback notification f...
problem description APNs push returns { "reason ": "MissingProviderToken "} even though the PEM certificate is provided. the environmental background of the problems and what methods you have tried after carefully confirming the official document...