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Split comma-separated strings in a column into separate rows
... using the microbenchmark package (see code below).
The sample data given by the OP consists only of 20 rows. To create larger data frames, these 20 rows are simply repeated 1, 10, 100, 1000, 10000, and 100000 times which give problem sizes of up to 2 million rows.
Benchmark results
The benchm...
What is %2C in a URL?
...for a comma (,).
i.e. , = %2C
like in my link suppose i want to order by two fields means in my link it will come like
order_by=id%2Cname which is equal to order_by=id,name .
share
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improve t...
“icon-bar” in twitter bootstrap navigation bar
...ks like ≡ on narrow browser screens. You can resize your browser window (by making it narrow) to see how the navbar is replaced by that button.
The three span tags create three horizontal lines that look like a button, commonly known as the "burger" icon.
Take a look at icon-bar in bootstrap.css...
await vs Task.Wait - Deadlock?
...is scheduled as a continuation.
You also mentioned a "cooperative block", by which I assume you mean a task that you're Waiting on may execute on the waiting thread. There are situations where this can happen, but it's an optimization. There are many situations where it can't happen, like if the ta...
Convert pandas dataframe to NumPy array
...ay(['a', 'b', 'c'], dtype=object)
df['A'].to_numpy()
# array([1, 2, 3])
By default, a view is returned, so any modifications made will affect the original.
v = df.to_numpy()
v[0, 0] = -1
df
A B
a -1 4
b 2 5
c 3 6
If you need a copy instead, use to_numpy(copy=True).
pandas >= 1.0 u...
Is it better to return null or empty collection?
... prevents the aforementioned nonsense, and prevents your car getting egged by co-workers and users of your classes.
When talking about properties, always set your property once and forget it
public List<Foo> Foos {public get; private set;}
public Bar() { Foos = new List<Foo>(); }
In...
How can I get stock quotes using Google Finance API?
...
Edit: the api call has been removed by google. so it is no longer functioning.
Agree with Pareshkumar's answer. Now there is a python wrapper googlefinance for the url call.
Install googlefinance
$pip install googlefinance
It is easy to get current stock ...
Run a Docker image as a container
... tag/name or not.
$ docker images
REPOSITORY TAG ID CREATED SIZE
ubuntu 12.04 8dbd9e392a96 4 months ago 131.5 MB (virtual 131.5 MB)
With a name (let's use Ubuntu):
$ docker run -i -t ubuntu:12.04 /bin/...
Are there strongly-typed collections in Objective-C?
...oundation collection classes, Objective-C lightweight generics are ignored by Swift. Any other types using lightweight generics are imported into Swift as if they were unparameterized.
Interacting with Objective-C APIs
sha...
How do you debug MySQL stored procedures?
...t my trial with this has been a very different experience to that reported by @kellogs above. The tool is nice and lightweight and seems to do just the job needed without any bloat. It was a far better experience for me than any of the other tools trialled (i.e. Visual Studio, Toad and dbForge Studi...