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Remove leading comma from a string
...lit("','");
["first string", "more", "even more"]
To extract a substring from a string I usually use slice() but substr() and substring() also do the job.
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How is Docker different from a virtual machine?
...sources, a full VM is the way to go. If you just want to isolate processes from each other and want to run a ton of them on a reasonably sized host, then Docker/LXC/runC seems to be the way to go.
For more information, check out this set of blog posts which do a good job of explaining how LXC works...
Circle line-segment collision detection algorithm?
I have a line from A to B and a circle positioned at C with the radius R.
27 Answers
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What exactly is an HTTP Entity?
... # Not part of the entity.
Content-Type: text/plain # ┬ The entity is from this line down...
Content-Length: 1234 # │
# │
Hello, World! ... # ┘
And a response:
HTTP/1.1 200 OK # Not part of the entity.
Content-Length: 438 ...
Anything wrong with NOT signing a .NET assembly?
...semblies. He literally tries to sign anything. Even when we use assemblies from Microsoft that are not signed, he will take the source code, sign it and then ask other developers to use his copy instead.
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HTTP 1.0 vs 1.1
...s a new return code in HTTP/1.1 100 Continue. This is to prevent a client from sending a large request when that client is not even sure if the server can process the request, or is authorized to process the request. In this case the client sends only the headers, and the server will tell the clie...
Rails ActionMailer - format sender and recipient name/email address
...ully validate or escape the name and email, you can end up with an invalid From header by simply concatenating strings. Here is a safe way:
require 'mail'
address = Mail::Address.new email # ex: "john@example.com"
address.display_name = name.dup # ex: "John Doe"
# Set the From or Reply-To header ...
Java, List only subdirectories from a directory, not files
In Java, How do I list only subdirectories from a directory?
13 Answers
13
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convert ArrayList to JSONArray
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If I read the JSONArray constructors correctly, you can build them from any Collection (arrayList is a subclass of Collection) like so:
ArrayList<String> list = new ArrayList<String>();
list.add("foo");
list.add("baar");
JSONArray jsArray = new JSONArray(list);
References:
j...
What does axis in pandas mean?
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I think the confusion comes from the complexity of each so-called "act". df.dropna(axis=0) will first check all the COLUMNS in each ROW and then drop those ROWS with a null. The axis talks about the last step but our brain will focus on the first part....