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Java 8 Stream and operation on arrays
... over the indexes of the array.
//in this example a[] and b[] are same length
int[] a = ...
int[] b = ...
int[] result = new int[a.length];
IntStream.range(0, a.length)
.forEach(i -> result[i] = a[i] * b[i]);
EDIT
Commenter @Holger points out you can use the map method instead of f...
Calculating Pearson correlation and significance in Python
... pydoc import help
from scipy.stats.stats import pearsonr
help(pearsonr)
>>>
Help on function pearsonr in module scipy.stats.stats:
pearsonr(x, y)
Calculates a Pearson correlation coefficient and the p-value for testing
non-correlation.
The Pearson correlation coefficient measures the...
Fold / Collapse the except code section in sublime text 2
...
If you want to collapse/expand all - you can do so by going to edit->code folding and choose "fold all" or "unfold all":
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How do I solve the INSTALL_FAILED_DEXOPT error?
...ots with the same disk space warning but factory resetting it (Settings --> Backup and Restore inside the emulator) solved it entirely for me.
Just a bit odd that it doesn't work out of the box with default settings.
sha...
“ValueError: zero length field name in format” error in Python 3.0,3.1,3.2
...ers can be
omitted, so '{} {}' is equivalent to '{0} {1}'.
python2.6.4>>> print '|{0:^12}|{1:^12}|'.format(3,4)
| 3 | 4 |
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Why would finding a type's initializer throw a NullReferenceException?
... to load from [rsi+8] when @rsi is NULL. Lets inspect the function:
0:000> ln 000007fe`e5735403
(000007fe`e5735360) mscorlib_ni!System.RuntimeType.GetConstructorImpl(System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection...
Eclipse jump to closing brace
...
The steps to turn this cool feature on: Window -> Preferences -> Java -> Editor-> Bracket highlighting -> Enclosing brackets
– JohnEye
Aug 13 '12 at 13:50
...
How to get the last element of an array in Ruby?
...ex (negative indices count backward from the end of the array):
a[-1] # => 5
b[-1] # => 6
or Array#last method:
a.last # => 5
b.last # => 6
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Proper way to return JSON using node or Express
.../json');
res.end(JSON.stringify({ a: 1 }));
});
app.listen(3000);
// > {"a":1}
Prettified:
var http = require('http');
var app = http.createServer(function(req,res){
res.setHeader('Content-Type', 'application/json');
res.end(JSON.stringify({ a: 1 }, null, 3));
});
app.listen(3000);...
How does cookie based authentication work?
...need to do? In what order? How do we keep things secure?
Step 1: Client > Signing up
Before anything else, the user has to sign up. The client posts a HTTP request to the server containing his/her username and password.
Step 2: Server > Handling sign up
The server receives this request an...