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Create numpy matrix filled with NaNs
...need loops for vector operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed th...
How to make a select with array contains value clause in psql
I have column arr which is of type array .
3 Answers
3
...
PHP json_encode encoding numbers as strings
...
I've done a very quick test :
$a = array(
'id' => 152,
'another' => 'test',
'ananother' => 456,
);
$json = json_encode($a);
echo $json;
This seems to be like what you describe, if I'm not mistaken ?
And I'm getting as output :
{"id":15...
What's the rationale for null terminated strings?
...emantics of strings are fully subsumed by more general rules governing all arrays, and as a result the language is simpler to describe..."
– AShelly
Nov 13 '15 at 17:41
add a ...
How to split (chunk) a Ruby array into parts of X elements? [duplicate]
I have an array
2 Answers
2
...
Ruby array to string conversion
I have a ruby array like ['12','34','35','231'] .
12 Answers
12
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Get data from JSON file with PHP [duplicate]
...:
$json = json_decode($str, true); // decode the JSON into an associative array
You have an associative array containing all the information. To figure out how to access the values you need, you can do the following:
echo '<pre>' . print_r($json, true) . '</pre>';
This will print o...
How do I zip two arrays in JavaScript? [duplicate]
I have 2 arrays:
2 Answers
2
...
map function for objects (instead of arrays)
... 6 }
console.log(myObject);
// => { 'a': 1, 'b': 2, 'c': 3 }
Array.prototype.reduce reduces an array to a single value by somewhat merging the previous value with the current. The chain is initialized by an empty object {}. On every iteration a new key of myObject is added with twice t...
Iteration ng-repeat only X times in AngularJs
...s should be the answer, as it also works with iterating over objects in an array. Plus its a Angular feature.
– Ashley Coolman
May 22 '14 at 23:41
29
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