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Why do we have to normalize the input for an artificial neural network?
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It's explained well here.
If the input variables are combined linearly, as in an MLP [multilayer perceptron], then it is
rarely strictly necessary to standardize the inputs, at least in theory. The
reason is that any rescaling of an input vector c...
Replacing instances of a character in a string
This simple code that simply tries to replace semicolons (at i-specified postions) by colons does not work:
13 Answers
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.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...rray consistently outperforms the version with a presized array. Note that if you can reuse an existing array of the correct size, the result may be different.
Benchmark results (score in microseconds, smaller = better):
Benchmark (n) Mode Samples Score Error Units
c.a...
How does “do something OR DIE()” work in PHP?
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If the first statement returns true, then the entire statement must be true therefore the second part is never executed.
For example:
$x = 5;
true or $x++;
echo $x; // 5
false or $x++;
echo $x; // 6
Therefore, if your q...
Finishing current activity from a fragment
... Oct 26 '11 at 19:41
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What's the most efficient test of whether a PHP string ends with another string?
...r_compare($str, $test, strlen($str)-strlen($test), strlen($test)) === 0;
If $test is longer than $str PHP will give a warning, so you need to check for that first.
function endswith($string, $test) {
$strlen = strlen($string);
$testlen = strlen($test);
if ($testlen > $strlen) retur...
Android - Pulling SQlite database android device
...ed everywhere and i can't find a real precise answer or a tutorial on how, if it is possible, to do this.
19 Answers
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How to get rid of the 'undeclared selector' warning
.... For example, there's a category method that should set an error property if the NSObject instance it's called on supports it. This is the code, and the code works as intended:
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How to put a line comment for a multi-line command [duplicate]
...sagree, Marwan's answer is clever but feels like an abuse of substitution. If anything I'd say Philipp's answer is closer to something I'd want to do.
– Alec
Sep 20 '17 at 18:27
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Sequelize, convert entity to plain object
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If I get you right, you want to add the sensors collection to the node. If you have a mapping between both models you can either use the include functionality explained here or the values getter defined on every instance. You...