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Why are side-effects modeled as monads in Haskell?
...ns are useless if we can't chain them together. Consider
getLine :: IO String ~ RealWorld -> (String, RealWorld)
getContents :: String -> IO String ~ String -> RealWorld -> (String, RealWorld)
putStrLn :: String -> IO () ~ String -> RealWorld -&...
When should one use final for method parameters and local variables?
...l variables when using conditions.
Let me give you an example:
final String name;
switch(pluginType) {
case CANDIDATE_EXPORT:
name = "Candidate Stuff";
break;
case JOB_POSTING_IMPORT:
name = "Blah";
break;
default:
...
Android device does not show up in adb list [closed]
...show up with "Unknown driver" status.
Click on "Update Driver" and select /extras/google/usb_driver
Device Manager will find the driver and warn you about installing it. Select "Yes."
This time the device got installed properly.
Note that I didn't have to modify winusb.inf file or update any othe...
Why is parenthesis in print voluntary in Python 2.7?
..., expr2, ... exprn
(Each expression in turn is evaluated, converted to a string and displayed with a space between them.)
But remember that putting parentheses around an expression is still the same expression.
So you can also write this as:
print (expr1), (expr2), ... (expr3)
This has nothin...
How to update PATH variable permanently from Windows command line?
...rom the command line ( cmd.exe ) and then execute echo %PATH% I see this string added to the PATH. If I close and open the command line, that new string is not in PATH.
...
In where shall I use isset() and !empty()
I read somewhere that the isset() function treats an empty string as TRUE , therefore isset() is not an effective way to validate text inputs and text boxes from a HTML form.
...
How to do Base64 encoding in node.js?
...
Buffers can be used for taking a string or piece of data and doing base64 encoding of the result. For example:
> console.log(Buffer.from("Hello World").toString('base64'));
SGVsbG8gV29ybGQ=
> console.log(Buffer.from("SGVsbG8gV29ybGQ=", 'base64').toStr...
How can I rename a database column in a Ruby on Rails migration?
...cord::Migration
def up
add_column :table, :correct_name_column_one, :string
add_column :table, :correct_name_column_two, :string
puts 'Updating correctly named columns'
execute "UPDATE table_name SET correct_name_column_one = old_name_column_one, correct_name_column_two = old_name...
Bootstrap modal: background jumps to top on toggle
... you told to override the css for .modal-open class. But, what if there is extra closing divs, and in my answer, I have not override any classes in my resolution? It works fine after removing 2 extra divs. bs modal adding .modal-backdrop div which will get confused where it needed to be closed becau...
Python string.join(list) on object array rather than string array
...
The built-in string constructor will automatically call obj.__str__:
''.join(map(str,list))
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