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Why are global variables evil? [closed]
...hon (and in programming in general). Can somebody explain? Links with more info would also be appreciated.
4 Answers
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How do I convert a string to a double in Python?
...d some code samples:
https://docs.python.org/3/library/sys.html#sys.float_info
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Truncate all tables in a MySQL database in one command?
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SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';')
FROM INFORMATION_SCHEMA.TABLES where table_schema in ('db1_name','db2_name');
Use Query Result to truncate tables
Note:
may be you will get this error:
ERROR 1217 (23000): Cannot delete or update a parent row: a fore...
Adding Xcode Workspace Schemes to Version Control
...t "Container" is selected for the scheme in the Manage Schemes sheet? More info is needed.
– Joshua Nozzi
Sep 16 '15 at 3:47
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Java Hashmap: How to get key from value?
...println(entry.getKey());
}
}
}
}
Some additional info... May be useful to you
Above method may not be good if your hashmap is really big. If your hashmap contain unique key to unique value mapping, you can maintain one more hashmap that contain mapping from Value to Key.
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iPhone Debugging: How to resolve 'failed to get the task for process'?
...n many cases (e.g., distribution through the App Store.) See here for more information on the cases when Entitlements.plist is required:
IMPORTANT: An Entitlements file is generally only needed when building for Ad Hoc Distribution or enabling Keychain data sharing. If neither of these is true, ...
Is there a list of Pytz Timezones?
...n shows the terrible result pytz can give: (datetime(2017,2,13,14,29,29, tzinfo=pytz.timezone('Asia/Shanghai')) - datetime(2017,2,13,14,29,29, tzinfo=pytz.timezone('UTC'))).total_seconds() (the result is not -28800). I will avoid pytz—dateutil.tz provides similar functionalities but uses the OS ti...
HTML text input allow only numeric input
...m the value wont update in form control value.
– Ale_info
Jul 16 '19 at 15:39
Awesome. I change the event to this.v...
Can Powershell Run Commands in Parallel?
...plete
While (Get-Job -State "Running")
{
Start-Sleep 10
}
# Getting the information back from the jobs
Get-Job | Receive-Job
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Return multiple values to a method caller
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For your info, a small (irrelevant) typo: In the struct/class solutions you mixed up adding/multiplying.
– Szak1
May 4 '18 at 15:30
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