大约有 11,293 项符合查询结果（耗时：0.0302秒） [XML]
Shorthand way for assigning a single field in a record, while copying the rest of the fields?
...ting record fields. In GHCi you can do --
> data Foo = Foo { a :: Int, b :: Int, c :: String } -- define a Foo
> let foo = Foo { a = 1, b = 2, c = "Hello" } -- create a Foo
> let updateFoo x = x { c = "Goodbye" } -- function to update Foos
> updateFoo foo ...
How to convert float to int with Java
I used the following line to convert float to int, but it's not as accurate as I'd like:
7 Answers
...
Why is there “data” and “newtype” in Haskell? [duplicate]
It seems that a newtype definition is just a data definition that obeys some restrictions (e.g., only one constructor), and that due to these restrictions the runtime system can handle newtype s more efficiently. And the handling of pattern matching for undefined values is slightly different.
...
How can I convert JSON to CSV?
...
First, your JSON has nested objects, so it normally cannot be directly converted to CSV. You need to change that to something like this:
{
"pk": 22,
"model": "auth.permission",
"codename": "add_logentry",
"content_type": 8,
"name": "...
Is there a “null coalescing” operator in JavaScript?
...d, and otherwise returns its left-hand-side operand.
Please check compatibility before using it.
The JavaScript equivalent of the C# null coalescing operator (??) is using a logical OR (||):
var whatIWant = someString || "Cookies!";
There are cases (clarified below) that the behaviour won't ...
ALTER TABLE to add a composite primary key
I have a table called provider . I have three columns called person , place , thing . There can be duplicate persons, duplicate places, and duplicate things, but there can never be a dupicate person-place-thing combination.
...
var functionName = function() {} vs function functionName() {}
...ve recently started maintaining someone else's JavaScript code. I'm fixing bugs, adding features and also trying to tidy up the code and make it more consistent.
...
How to use setArguments() and getArguments() methods in Fragments?
...
You have a method called getArguments() that belongs to Fragment class.
share
|
improve this answer
|
follow
|
...
Python matplotlib multiple bars
How to plot multiple bars in matplotlib, when I tried to call the bar function multiple times, they overlap and as seen the below figure the highest value red can be seen only.
How can I plot the multiple bars with dates on the x-axes?
...
Event handling for iOS - how hitTest:withEvent: and pointInside:withEvent: are related?
...e for iOS ' is an exception. It's hard for me to clearly understand what's been described there.
7 Answers
...