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What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]
... a reference to an instance of class String, and is derived from a CONSTANT_String_info structure (§4.4.3) in the binary representation of a class or interface. The CONSTANT_String_info structure gives the sequence of Unicode code points constituting the string literal.
The Java programming la...
How do I see active SQL Server connections?
...
I like to ORDER BY 1, 2 DESC, 3
– slartidan
Jul 10 '19 at 14:56
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How can I debug git/git-shell related problems?
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For even more verbose output use following:
GIT_CURL_VERBOSE=1 GIT_TRACE=1 git pull origin master
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“The underlying connection was closed: An unexpected error occurred on a send.” With SSL Certificate
...ed to TLS 1.2. As a result I had to install .net 4.5.2 on my web server in order to support it.
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How do I prevent an Android device from going to sleep programmatically?
... need to be sure you have the WAKE_LOCK permission set in your manifest in order to use this method.
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How to change legend title in ggplot
...ould work:
p <- ggplot(df, aes(x=rating, fill=cond)) +
geom_density(alpha=.3) +
xlab("NEW RATING TITLE") +
ylab("NEW DENSITY TITLE")
p <- p + guides(fill=guide_legend(title="New Legend Title"))
(or alternatively)
p + scale_fill_discrete(name = "New Legen...
Does SQLAlchemy have an equivalent of Django's get_or_create?
...ortcut readily available AFAIK.
You could generalize it ofcourse:
def get_or_create(session, model, defaults=None, **kwargs):
instance = session.query(model).filter_by(**kwargs).first()
if instance:
return instance, False
else:
params = dict((k, v) for k, v in kwargs.it...
How to detect that animation has ended on UITableView beginUpdates/endUpdates?
...targeting iOS 11 and above, you should use UITableView.performBatchUpdates(_:completion:) instead:
tableView.performBatchUpdates({
// delete some cells
// insert some cells
}, completion: { finished in
// animation complete
})
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Parsing CSV files in C#, with header
...ally map field headers, expecting instead that the columns are in the same order as the fields are declared in your type. I wouldn't use it, personally.
– Alastair Maw
Sep 20 '19 at 11:11
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Representing and solving a maze given an image
...d image directly.
Here is the MATLAB code for BFS:
function path = solve_maze(img_file)
%% Init data
img = imread(img_file);
img = rgb2gray(img);
maze = img > 0;
start = [985 398];
finish = [26 399];
%% Init BFS
n = numel(maze);
Q = zeros(n, 2);
M = zeros([size(maze) 2]);
...