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Reading value from console, interactively
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you can't do a "while(done)" loop because that would require blocking on input, something node.js doesn't like to do.
Instead set up a callback to be called each time something is entered:
var stdin = process.openStdin();
stdin.addL...
Live-stream video from one android phone to another over WiFi
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If you do not need the recording and playback functionality in your app, using off-the-shelf streaming app and player is a reasonable choice.
If you do need them to be in your app, however, you will have to look into MediaRecorde...
How can I compare two lists in python and return matches
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Not the most efficient one, but by far the most obvious way to do it is:
>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(a) & set(b)
{5}
if order is significant you can do it with list comprehensions like this:
>>> [i for i, j in zip(a,...
Serializing PHP object to JSON
...pelling reasons to stay at <5.4, or even already use version >= 5.4, do not use this answer, and just use PHP>= 5.4 (or, you know, a recent one) and implement the JsonSerializable interface
You would define a function, for instance named getJsonData();, which would return either an array...
Specifying column name in a “references” migration
...o make a migration in Rails, referencing another table. Usually, I would do something like:
6 Answers
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How to test multiple variables against a value?
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You misunderstand how boolean expressions work; they don't work like an English sentence and guess that you are talking about the same comparison for all names here. You are looking for:
if x == 1 or y == 1 or z == 1:
x and y are otherwise evaluated on their own (False if 0,...
Enterprise app deployment doesn't work on iOS 7.1
...m message that iOS unhelpfully displays when there is any sort of problem downloading the app.
16 Answers
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Very large matrices using Python and NumPy
...of rows. It's also very fast; my 5 year old laptop can crunch through data doing SQL-like GROUP BY aggregation at 1,000,000 rows/second. Not bad for a Python-based solution!
Accessing the data as a NumPy recarray again is as simple as:
data = table[row_from:row_to]
The HDF library takes care of ...
Member '' cannot be accessed with an instance reference
...and Java, you can't access static members with instance syntax. You should do:
MyClass.MyItem.Property1
to refer to that property or remove the static modifier from Property1 (which is what you probably want to do). For a conceptual idea about what static is, see my other answer.
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Resharper Alt Enter not working
...the following steps in numerical order.
Symptom B: pressing Alt+Enter ↵ does nothing. Fix using Step #2 first then try Step #1 if the issue persists.
Perform a Visual Studio reset:
Run cmd.exe as Administrator
cd C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\
devenv.exe /Re...