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R programming: How do I get Euler's number?
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The R expression
exp(1)
represents e, and
exp(2)
represents e^2.
This works because exp is the exponentiation function with base e.
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Commands out of sync; you can't run this command now
...m trying to execute my PHP code, which calls two MySQL queries via mysqli, and get the error "Commands out of sync; you can't run this command now".
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Which library should I use for server-side image manipulation on Node.JS? [closed]
...libraries on Node.JS wiki but I'm not sure which of those are more mature and provide better performance. Basically I want to do the following:
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Single Line Nested For Loops
..., (2, 4), (3, 1), (3, 4)]
It's exactly the same as this nested for loop (and, as the tutorial says, note how the order of for and if are the same).
>>> combs = []
>>> for x in [1,2,3]:
... for y in [3,1,4]:
... if x != y:
... combs.append((x, y))
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How to pass prepareForSegue: an object
... grab a reference to the target view controller in prepareForSegue: method and pass any objects you need to there. Here's an example...
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Make sure your segue name in storyboard is the same as this line
if ([[segue iden...
How do you manually execute SQL commands in Ruby On Rails using NuoDB
I'm trying to manually execute SQL commands so I can access procedures in NuoDB.
4 Answers
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Can you create nested WITH clauses for Common Table Expressions?
...wered Sep 11 '09 at 22:12
David AndresDavid Andres
28.8k77 gold badges4141 silver badges3535 bronze badges
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Easy way to convert Iterable to Collection
...eates a copy of the iterable. It wasn't specified that a view was desired, and given that most of the methods on Collection either can't be implemented for a view of an Iterable or won't be efficient, it doesn't make much sense to me to do that.
– ColinD
Jun 20...
Asp.net - Add blank item at top of dropdownlist
...nately, you can instantiate a ListItem, set its Selected property to true, and then insert it into drpList as above.
– skia.heliou
Jun 15 '15 at 16:22
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Most efficient conversion of ResultSet to JSON?
...e following code converts a ResultSet to a JSON string using JSONArray and JSONObject .
14 Answers
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