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How do I extract a sub-hash from a hash?
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If you specifically want the method to return the extracted elements but h1 to remain the same:
h1 = {:a => :A, :b => :B, :c => :C, :d => :D}
h2 = h1.select {|key, value| [:b, :d, :e, :f].include?(key) } # => {...
How can I detect when an Android application is running in the emulator?
I would like to have my code run slightly differently when running on the emulator than when running on a device. ( For example , using 10.0.2.2 instead of a public URL to run against a development server automatically.) What is the best way to detect when an Android application is running in the em...
MYSQL Truncated incorrect DOUBLE value
...s the correct syntax of the UPDATE statement:
UPDATE
shop_category
SET
name = 'Secolul XVI - XVIII',
name_eng = '16th to 18th centuries'
WHERE
category_id = 4768
share
|
imp...
CSS for grabbing cursors (drag & drop)
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For anyone having trouble with this solution, I had to set the grab cursor on :hover rather than the plain selector, i.e. .grabbable:hover in the example above.
– Markus Amalthea Magnuson
Oct 25 '16 at 10:15
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What is the printf format specifier for bool?
Since ANSI C99 there is _Bool or bool via stdbool.h . But is there also a printf format specifier for bool?
8 Answer...
Add a new line in file?
... editor after snippets, if snippets enabled
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ReactJS - Does render get called any time “setState” is called?
Does React re-render all components and sub components every time setState() is called?
7 Answers
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git revert back to certain commit [duplicate]
how do i revert all my files on my local copy back to a certain commit?
3 Answers
3
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Case objects vs Enumerations in Scala
...ys to handle not finding a currency code string than "breaking" the closed set nature of the Currency type. UnknownCurrency being of type Currency can now sneak into other parts of an API.
It's advisable to push that case outside Enumeration and make the client deal with an Option[Currency] type tha...
Inspect attached event handlers for any DOM element
...f you do not use delegated event attachment
or direct event assignments by setting attributes like onclick or oninput.
I went on to find out whether the "sniffing" could be made a little more universal and came up with the following modified version:
(nativeMethod=>{ // IIFE-closure to manip...