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Representing Directory & File Structure in Markdown Syntax [closed]
...nores node_modules, and .git folders.
Troubleshooting
If you receive the error 'node\r: No such file or directory', the issue is that your operating system uses different line endings and mddir can't parse them without you explicitly setting the line ending style to Unix. This usually affects Wind...
Troubleshooting “Illegal mix of collations” error in mysql
Am getting the below error when trying to do a select through a stored procedure in MySQL.
16 Answers
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Python: try statement in a single line
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Some people abuse the short-circuiting behavior of or to do this. This is error prone, so I never use it.
c = None
b = [1, 2]
a = c or b
Consider the following case:
c = []
b = [1, 2]
a = c or b
In this case, a probably should be [], but it is [1, 2] because [] is false in a boolean context. ...
How to import the class within the same directory or sub directory?
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if i try this no i get the following error ValueError: Attempted relative import in non-package but error goes away when i change to from user import User
– Korpel
Feb 23 '16 at 8:18
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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...rameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the parameters object, returning only the permitted keys and values. When creating a new Acti...
Why is “copy and paste” of code dangerous? [closed]
...spoken assumptions to be correct, copying it into another place results in errors unless these assumptions also hold in the new place. Therefore, the pasted code is often wrong from the start and not just after the next change.
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Make sure that the controller has a parameterless public constructor error
...ered concrete types for you, but because it can't resolve it (caused by an error in your configuration), it return null. It is forced to return null, because Web API forces it to do so due to the IDependencyResolver contract. Since Unity returns null, Web API will try to create the controller itself...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
...ee in the console
myFunction(); // unreachable, will throw an error, see in the console
myObject.anotherFunc(); // unreachable, will throw an error, see in the console
In the example above, any variable defined in the function (i.e. declared using var) will be "private" and accessi...
Python: Is it bad form to raise exceptions within __init__?
... within __init__ ? If so, then what is the accepted method of throwing an error when certain class variables are initialized as None or of an incorrect type?
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How to check if a String contains another String in a case insensitive manner in Java?
...tains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching:
Pattern.compile(Pattern.quote(wantedStr), Pattern.CASE_INSENSITIVE).matcher(source).find();
EDIT: If s2 contains regex special characters (of which there are many) it's impo...