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How to detect Safari, Chrome, IE, Firefox and Opera browser?
...lt to prevent it from needing to work it out the next time the function is called.
Reading file contents on the client-side in javascript in various browsers
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shouldn't the event handlers be attached before calling readAsText ?
– goofballLogic
Jan 19 '18 at 14:19
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show 4...
Is there a pattern for initializing objects created via a DI container
...ethod are generally thought to be bad design, as you need to "remember" to call them and make sure they don't open up too much of your implementation's state (i.e. what is to stop someone from re-calling initialize or the setter?).
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What is so special about Generic.xaml?
...urrent Windows theme e.g. on Vista using the Aero theme, the dictionary is called Aero.NormalColor.xaml, on XP using the default theme it is Luna.NormalColor.xaml. If the style is not found in the theme dictionary, it looks in Generic.xaml i.e for controls whose look doesn't depend on the theme.
Th...
Can JSON start with “[”?
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JSON can be either an array or an object. Specifically off of json.org:
JSON is built on two structures:
A collection of name/value pairs. In various languages, this is
realized as an object, record,
struct, dictionary, hash table,
keyed list, ...
Why were pandas merges in python faster than data.table merges in R in 2012?
...vels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent efforts have gone into allowing character columns in keys, which should resolve that issue...
Find all records which have a count of an association greater than zero
... To remove the duplicates, use
Project.joins(:vacancies).group('projects.id')
UPDATE:
As pointed out by @Tolsee, you can also use distinct.
Project.joins(:vacancies).distinct
As an example
[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, ...
SQL join: selecting the last records in a one-to-many relationship
...mmend solving it:
SELECT c.*, p1.*
FROM customer c
JOIN purchase p1 ON (c.id = p1.customer_id)
LEFT OUTER JOIN purchase p2 ON (c.id = p2.customer_id AND
(p1.date < p2.date OR (p1.date = p2.date AND p1.id < p2.id)))
WHERE p2.id IS NULL;
Explanation: given a row p1, there should be no ro...
Read the package name of an Android APK
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Is there a way to call this from within Android code? I want to be able to launch a package of an apk I download through my app.
– Matt Wear
Jun 19 '12 at 15:59
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javascript find and remove object in array based on key value
...been trying several approaches on how to find an object in an array, where ID = var, and if found, remove the object from the array and return the new array of objects.
...