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How to enter in a Docker container already running with a new TTY
...sion. I'm sure docker exec -it will eventually provide a fully-functional pseudo tty, but for now (Docker version 1.9.1), there are some shortcomings : github.com/docker/docker/issues/8755
– blong
Jan 5 '16 at 3:11
...
How do you count the lines of code in a Visual Studio solution?
...ng more formal should be required.
From a smallish solution's directory:
PS C:\Path> (gci -include *.cs,*.xaml -recurse | select-string .).Count
8396
PS C:\Path>
That will count the non-blank lines in all the solution's .cs and .xaml files. For a larger project, I just used a different ex...
PowerShell: Setting an environment variable for a single command only
... Keith, we have a push-environmentblock and pop-environmentblock in Pscx for exactly this scenario ;-)
– x0n
Sep 14 '09 at 16:25
2
...
Error handling in getJSON calls
...k, Flask's jsonify f and SQLAlchemy)
try:
snip = Snip.query.filter_by(user_id=current_user.get_id(), id=snip_id).first()
db.session.delete(snip)
db.session.commit()
return jsonify(success=True)
except Exception, e:
logging.debug(e)
return jsonify(error="Sorry, we couldn't de...
What does inverse_of do? What SQL does it generate?
...gnment against non existing or invalid entries with validates_presence of :user_id, :role_id, it is useful. You can still generate a User @user with his association @user.role(params[:role_id]) so that saving the user would not result in a failing validation of the Assignment model.
...
大数据能否拯救中国足球？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...号文”，将体育产业上升为“国家战略”。文件指出，到2025年，中国体育产业总规模将超过5万亿元。而今年4月《中国足球中长期发展规划》的发布不仅意味着2016年将是体育、足球的大年，更意味着中国体育、足球产业将迎来...
pandas three-way joining multiple dataframes on columns
... I'd put them in a list like this (generated via list comprehensions or loops or whatnot):
dfs = [df0, df1, df2, dfN]
Assuming they have some common column, like name in your example, I'd do the following:
df_final = reduce(lambda left,right: pd.merge(left,right,on='name'), dfs)
That way, your...
How to get all subsets of a set? (powerset)
...h is the power set of A."""
length = len(A)
l = [a for a in A]
ps = set()
for i in range(2 ** length):
selector = f'{i:0{length}b}'
subset = {l[j] for j, bit in enumerate(selector) if bit == '1'}
ps.add(frozenset(subset))
return ps
If you want exactly ...
LEFT OUTER JOIN in LINQ
... in categories
join p in products on c.Category equals p.Category into ps
from p in ps.DefaultIfEmpty()
select new { Category = c, ProductName = p == null ? "(No products)" : p.ProductName };
share
|
...
Using “like” wildcard in prepared statement
..., "!%")
.replace("_", "!_")
.replace("[", "![");
PreparedStatement pstmt = con.prepareStatement(
"SELECT * FROM analysis WHERE notes LIKE ? ESCAPE '!'");
pstmt.setString(1, notes + "%");
or a suffix-match:
pstmt.setString(1, "%" + notes);
or a global match:
pstmt.setString(1, "...