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Why is the String class declared final in Java?
...our whole environment (sandbox) through reflection and secretKey.intern().getClass().getClassLoader().
Or the JVM could block this hole by making sure that only concrete String objects (and no subclasses) were added to the pool.
If equals was implemented such that SafeString != String then SafeStr...
Disable a Button
... you have other actions occurring within your app (i.e. a timer, gamePlay, etc.). Rather than disabling the segue button, you might want to give your user the option to use that segue while the other actions are still occurring and WITHOUT CRASHING THE APP. Here's how:
var appMode = 0
@IBAction fu...
How do I format a date with Dart?
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how can we fetch only month eg. 1 for january, 2 for february... ? i have tried DateFormat('MM').format(DateTime.now()); but does not work in flutter. Please share your suggestion.
– Kamlesh
Jan 24 ...
What is Data Transfer Object?
...ST/whatever) endpoint from somewhere, or consuming a webservice using SOA, etc...) you do not want to transmit the big sized object with code that is not necessary for the endpoint, will consume data, and slow down the transfer.
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...f your index is a MultiIndex, reset_index() adds columns level_0, level_1, etc. And if your index has a name that name will be used in place of the "index" label. That makes this a bit more than a one-liner to do it right for any DataFrame. index_label = getattr(df.index, 'names', getattr(df.index, ...
Rails I18n validation deprecation warning
... of the previously mentioned methods (default_locale=, locale=, translate, etc), make sure to do it after setting the config.i18n.enforce_available_locales setting. Otherwise, the deprecation warning will keep on popping up. (Thanks Fábio Batista).
If you use third party gems that include I18n feat...
How do I create a URL shortener?
...ily by using some base conversion. Say you character space (A-Z, a-z, 0-9, etc.) has 62 characters, convert the id to a base-40 number and use the characters as the digits.
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What does 'require: false' in Gemfile mean?
...sk. This would then save memory in the main app processes and startup time etc. App performance, however, should not be affected even if you require these additional gems in every process.
– Michael van Rooijen
Aug 14 '12 at 23:52
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What are the most-used vim commands/keypresses?
...arrow keys to move around, selecting text with the mouse, using the menus, etc. Then when something is slowing you down, you look up the faster way to do it, and gradually add more and more commands. You might learn one new command per day for a while, then it will trickle to one per week. You'll...
How to architect an Ember.js application
...re you understand the core concepts: models, routes, services, components, etc. Ember docs are a great resource, but since I haven't come across a single updated guide connecting all concepts (much less with a sample app) I decided to write this up: emberigniter.com/5-essential-ember-2.0-concepts
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