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How to calculate the time interval between two time strings
...fically, the strptime function, which parses a string into a time object.
from datetime import datetime
s1 = '10:33:26'
s2 = '11:15:49' # for example
FMT = '%H:%M:%S'
tdelta = datetime.strptime(s2, FMT) - datetime.strptime(s1, FMT)
That gets you a timedelta object that contains the difference bet...
Concurrent HashSet in .NET Framework?
...al locking outside the class then why don't you use a simple HashSet right from the start?
– George Mavritsakis
Apr 11 '16 at 9:36
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std::wstring VS std::string
...ind of esoteric language glyphs (Klingon? Elvish?), while UTF-8 will spend from 1 to 4 bytes.
See http://en.wikipedia.org/wiki/UTF-8#Compared_to_UTF-16 for more info.
Conclusion
When I should use std::wstring over std::string?
On Linux? Almost never (§).
On Windows? Almost always (§).
On cros...
How to represent empty char in Java Character class
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As Character is a class deriving from Object, you can assign null as "instance":
Character myChar = null;
Problem solved ;)
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registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later
...anged in iOS 8. A UserNotification is a message shown to the user, whether from remote or from local. You need to get permission to show one. This is described in the WWDC 2014 video "What's New in iOS Notifications"
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How to log cron jobs?
...* * myjob.sh >> /var/log/myjob.log 2>&1
will log all output from the cron job to /var/log/myjob.log
You might use mail to send emails. Most systems will send unhandled cron job output by email to root or the corresponding user.
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List of Delphi language features and version in which they were introduced/deprecated
...in Delphi 3
What's New in Delphi 2
Delphi 1 Features
The full list from Embarcadero: What's New
See also: David I's list
To summarize:
Delphi 10.3.x, 10.4 (not yet out, this is speculative)
Custom managed records
Nullable types
Support for macOS 64-bit
Support for Android 64-b...
Is it possible to push a git stash to a remote repository?
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You can fetch the latest stash from a git remote, but not into your stash, only into another ref. Something like git fetch some-remote +refs/stash:refs/remotes/some-remote/stash the git stash apply some-remote/stash. But you can't get older stashes becaus...
git stash changes apply to new branch?
...inbotham no the Working Directory is common between branches and is copied from one to another when you pass from one branch to another. For "achieving" what you want I usually make different stashes, adding useful description with the git stash save "description" command mentioned previously; and t...
can't push to branch after rebase
... it allows me to see if there are remote changes without needing to switch from my devel branch. Second it's a safety mechanism to make sure I don't overwrite any un-stashed/committed changes. Also, if I can't fast-forward merge to the master branch that means either someone has rebased the remote m...