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Create a dictionary with list comprehension
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How can I disable a button in a jQuery dialog from a function?
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What does the tilde (~) mean in my composer.json file?
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Tilde means next significant release. In your case, it is equivalent to >= 2.0, < 3.0.
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encryption/decryption with multiple keys
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GnuPG does multi-key encryption in standard.
The following command will encrypt doc.txt using...
Elegant setup of Python logging in Django
...logging. (Note: NullHandler is already in the logging package for Python 3.1, and will be in Python 2.7.) So:
logger = logging.getLogger(__name__)
logger.addHandler(someutils.null_handler)
This is done to ensure that your modules play nicely in a site which doesn't configure logging in settings.p...
How to subtract a day from a date?
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You can use a timedelta object:
from datetime import datetime, timedelta
d = datetime.today...
How to use 'cp' command to exclude a specific directory?
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Difference between std::system_clock and std::steady_clock?
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From N3376:
20.11.7.1 [time.clock.system]/1:
Objects of class system_clock represent wall clock time from the system-wide realtime clock.
20.11.7.2 [time.clock.steady]/1:
Objects of class steady_clock represent clocks for which va...
Xcode 4 says “finished running ” on the targeted device — Nothing happens
... 4.2, and attempting to run on an earlier device (e.g. iPhone 3G, 2G, iPod 1st gen, etc) I have another solution. New projects created in Xcode 4.2 by default specify 'armv7' in the 'Required Device Capabilities'. You'll need to remove this if wanting to support devices that run armv6 (e.g. the iPh...
Remove last character from string. Swift language
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let name: String = "Dolphin"
let stringLength = count(name) // Since swift1.2 `countElements` became `count`
let substringIndex = stringLength - 1
name.substringToIndex(advance(name.startIndex, substringIndex)) // "Dolphi"
Alternatively (for a more practical, but less educational example) you can...