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How to elegantly rename all keys in a hash in Ruby? [duplicate]
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map returns an Array of Arrays, you can transform back to Hash by using ages.map {...}.to_h
– caesarsol
Sep 17 '14 at 13:49
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What does $_ mean in PowerShell?
...r example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable will contain the current value.
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How to Create Multiple Where Clause Query Using Laravel Eloquent?
...3 (and still true as of 7.x) you can use more granular wheres passed as an array:
$query->where([
['column_1', '=', 'value_1'],
['column_2', '<>', 'value_2'],
[COLUMN, OPERATOR, VALUE],
...
])
Personally I haven't found use-case for this over just multiple where calls, bu...
How to return a string value from a Bash function
... referenced by name's value. The -n attribute cannot be applied to
array variables.
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When used in a function, declare and typeset make each name local,
as with the local command, unless the -g option is supplied...
and also:
PARAMETERS
A variable can be assigned the nameref att...
JavaScript: filter() for Objects
ECMAScript 5 has the filter() prototype for Array types, but not Object types, if I understand correctly.
15 Answers
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Scatter plot and Color mapping in Python
I have a range of points x and y stored in numpy arrays.
Those represent x(t) and y(t) where t=0...T-1
3 Answers
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Convert a list of objects to an array of one of the object's properties
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You are looking for
MyList.Select(x=>x.Name).ToArray();
Since Select is an Extension method make sure to add that namespace by adding a
using System.Linq
to your file - then it will show up with Intellisense.
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What is an intuitive explanation of the Expectation Maximization technique? [closed]
...s) = 0.80 and pB(heads)=0.45
# represent the experiments
head_counts = np.array([5,9,8,4,7])
tail_counts = 10-head_counts
experiments = zip(head_counts,tail_counts)
# initialise the pA(heads) and pB(heads)
pA_heads = np.zeros(100); pA_heads[0] = 0.60
pB_heads = np.zeros(100); pB_heads[0] = 0.50
#...
AJAX Mailchimp signup form integration
...t to gather your users' name and/or other information. You have to add an array to the store-address.php file using the corresponding Merge Variables.
Here is what my store-address.php file looks like where I also gather the first name, last name, and email type:
<?php
function storeAddress()...
Is object empty? [duplicate]
...t with non-enumerable properties and Object.keys will just return an empty array... Object.getOwnPropertyNames returns an array containing all the own properties of an object, even if they aren't enumerable.
– Christian C. Salvadó
Feb 14 '11 at 16:11
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