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How to read/process command line arguments?
...
from argparse import ArgumentParser
parser = ArgumentParser()
parser.add_argument("-f", "--file", dest="filename",
help="write report to FILE", metavar="FILE")
parser.add_argument("-q", "--quiet",
action="store_false", dest="verbose", default=True,
...
How to enumerate an enum with String type?
...nt all possible values:
Suit.allCases.forEach {
print($0.rawValue)
}
Compatibility with earlier Swift versions (3.x and 4.x)
If you need to support Swift 3.x or 4.0, you may mimic the Swift 4.2 implementation by adding the following code:
#if !swift(>=4.2)
public protocol CaseIterable {
...
How to find the mysql data directory from command line in windows
...y from the command line:
mysql -uUSER -p -e 'SHOW VARIABLES WHERE Variable_Name LIKE "%dir"'
Output (on Linux):
+---------------------------+----------------------------+
| Variable_name | Value |
+---------------------------+----------------------------+
| based...
Warning: The Copy Bundle Resources build phase contains this target's Info.plist file
...
https://developer.apple.com/library/content/qa/qa1649/_index.html
Excerpt:
You are getting this warning because you probably added your Info.plist file to your Copy Bundle Resources build phase as shown in Figure
The INFO...
Location of my.cnf file on macOS
...lean install of MySQL 5.7.19 on Mac OS 10.12 using the .dmg from dev.mysql.com. There's no my.cnf in any of the places that mysql --help says it looks in. And there's no my-default.cnf in /usr/local/mysql/support-files/ or anywhere else I've found. Turns out that "as of MySQL 5.7.18, my-default.cnf ...
Rails find_or_create_by more than one attribute?
...ll of these were factored out of rails just the attribute specific ones.
https://github.com/rails/rails/blob/4-2-stable/guides/source/active_record_querying.md
Example
GroupMember.find_or_create_by_member_id_and_group_id(4, 7)
became
GroupMember.find_or_create_by(member_id: 4, group_id: 7)
...
How to show git log history for a sub directory of a git repo?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
javac is not recognized as an internal or external command, operable program or batch file [closed]
I am experiencing an error while trying to compile Java programs.
6 Answers
6
...
Enum type constraints in C# [duplicate]
...e'd need to do runtime work in addition to the language work. (see answer comments)
I can see that there are a few decent usage cases, but none of them are so compelling that we'd do this work rather than one of the hundreds of other features that are much more frequently requested, or have more c...
When and why to 'return false' in JavaScript?
...ode. Explanation and examples at Douglas Neiner's post here fuelyourcoding.com/jquery-events-stop-misusing-return-false
– Marquis Wang
Oct 11 '11 at 20:46
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