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Simplest way to check if key exists in object using CoffeeScript
In CoffeeScript, what is the simplest way to check if a key exists in an object?
3 Answers
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mysql create user if not exists
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In 5.7.6 and above, you should be able to use CREATE USER
CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a version which has this capability (something below 5.7.6), you can do th...
How can I catch all the exceptions that will be thrown through reading and writing a file?
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If you want, you can add throws clauses to your methods. Then you don't have to catch checked methods right away. That way, you can catch the exceptions later (perhaps at the same time as other exceptions).
The code looks ...
Making a UITableView scroll when text field is selected
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If you use UITableViewController instead of UIViewController, it will automatically do so.
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Could you explain STA and MTA?
...ndle their own synchronization. A common use of this is a UI component. So if another thread needs to interact with the object (such as pushing a button in a form) then the message is marshalled onto the STA thread. The windows forms message pumping system is an example of this.
If the COM object c...
What is the best (idiomatic) way to check the type of a Python variable? [duplicate]
I need to know if a variable in Python is a string or a dict. Is there anything wrong with the following code?
10 Answers
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Are iframes considered 'bad practice'? [closed]
Somewhere along the line I picked up the notion that using iframes is 'bad practice'.
11 Answers
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Difference between is and as keyword
Please tell what is the difference between is and as keyword in C#
14 Answers
14
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finding and replacing elements in a list
...2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
>>> for n, i in enumerate(a):
... if i == 1:
... a[n] = 10
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>>> a
[10, 2, 3, 4, 5, 10, 2, 3, 4, 5, 10]
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What is the real overhead of try/catch in C#?
...ect this happens only when the exception is thrown (but I don't know), and if so, this would be decently sized hidden cost every time an exception is thrown... so it's not like you are just jumping from one place in the code to another, there is a lot going on.
I don't think it's a problem as long ...