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For-each over an array in JavaScript
...rue and omitting the ones where it returns false)
map (creates a new array from the values returned by the callback)
reduce (builds up a value by repeatedly calling the callback, passing in previous values; see the spec for the details; useful for summing the contents of an array and many other thin...
What does Serializable mean?
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Serialization is persisting an object from memory to a sequence of bits, for instance for saving onto the disk. Deserialization is the opposite - reading data from the disk to hydrate/create an object.
In the context of your question, it is an interface that if ...
S3 Static Website Hosting Route All Paths to Index.html
...lt;/script>
This grabs the hash and turns it into an HTML5 pushState. From this point on you can use pushStates to have non-hash-bang paths in your app.
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What do “branch”, “tag” and “trunk” mean in Subversion repositories?
...s just a marker
Trunk would be the main body of development, originating from the start of the project until the present.
Branch will be a copy of code derived from a certain point in the trunk that is used for applying major changes to the code while preserving the integrity of the code in the tr...
How do I run a program with a different working directory from current, from Linux shell?
... Linux shell , how do I start a program with a different working directory from the current working directory?
11 Answers
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How to retrieve an element from a set without removing it?
...equire copying the whole set:
for e in s:
break
# e is now an element from s
Or...
e = next(iter(s))
But in general, sets don't support indexing or slicing.
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Create a submodule repository from a folder and keep its git commit history
...epository for this demo application and make it a subpackage submodule from main repository without losing its commit history.
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What is the difference between the 'COPY' and 'ADD' commands in a Dockerfile?
...identity, gzip, bzip2 or xz) then it is unpacked as a directory. Resources from remote URLs are not decompressed.
Note that the Best practices for writing Dockerfiles suggests using COPY where the magic of ADD is not required. Otherwise, you (since you had to look up this answer) are likely to ge...
How to execute a Python script from the Django shell?
I need to execute a Python script from the Django shell. I tried:
21 Answers
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Can't create handler inside thread that has not called Looper.prepare()
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You're calling it from a worker thread. You need to call Toast.makeText() (and most other functions dealing with the UI) from within the main thread. You could use a handler, for example.
Look up Communicating with the UI Thread in the docume...