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How to use GROUP_CONCAT in a CONCAT in MySQL
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select id, group_concat(`Name` separator ',') as `ColumnName`
from
(
select
id,
concat(`Name`, ':', group_concat(`Value` separator ',')) as `Name`
from mytbl
group by
id,
`Name`
) tbl
group by id;
You can see it imple...
What's a monitor in Java?
...also wait and notify methods that will also use object's monitor to communication among different threads.
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JavaScript Nested function
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It is called closure.
Basically, the function defined within other function is accessible only within this function. But may be passed as a result and then this result may be called.
It is a very powerful feature. You can see mor...
Correct way to populate an Array with a Range in Ruby
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You can create an array with a range using splat,
>> a=*(1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
using Kernel Array method,
Array (1..10)
=> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
or using to_a
(1..10).to_a
=> [1...
Install autoreconf on OS X v10.7 (Lion)?
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brew isn't included with OSX, but you can get it here: mxcl.github.com/homebrew
– RobM
Apr 25 '12 at 11:45
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Path.Combine absolute with relative path strings
...wise you end up with C:\\blah..\\bling.txt and that doesn't work. In that case you can manually add them to the string or do Path.GetFullPath(Path.Combine(baseDirectory, relativePath))
– Nelson Rothermel
Jun 6 '13 at 21:15
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Using 'starts with' selector on individual class names
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Hmm...clever! I hadn't thought of using space in there. Can one use boolean operators in a jquery selector? Ideally, the above would be 'OR' to avoid the (rare and likely avoidable) case where there are more than one class staring with 'apple-'
– DA.
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Calculate distance between two points in google maps V3
How do you calculate the distance between two markers in Google maps V3? (Similar to the distanceFrom function inV2.)
15 ...
How to pass an object into a state using UI-router?
...r is converted to string (EDIT: since 0.2.13, this is no longer true - you can use objects directly), but you can workaround it by creating the string on your own
toParamsJson = JSON.stringify(toStateParams);
and in target controller deserialize the object again
originalParams = JSON.parse($stat...
Equivalent of “continue” in Ruby
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Yes, it's called next.
for i in 0..5
if i < 2
next
end
puts "Value of local variable is #{i}"
end
This outputs the following:
Value of local variable is 2
Value of local variable is 3
Value of local variable is 4
V...