racl101 + array   240

PHP - How to merge arrays inside array - Stack Overflow

$new_arr = call_user_func_array('array_merge', array_map(function($val) use ($othe_arr) { return [ $item->key => $other_arr[$item->key] ]; }, $items_arr));
stackoverflow  howto  php  array_map  merge  arrays  new  keys  example  guide  reference  array  array_merge 
september 2018 by racl101
php - How do I convert an object to an array? - Stack Overflow
I use this approach to convert an array of PHP objects to an array of associative arrays. You need to do this in Laravel 5 when you query database rows not using an Eloquent Model facade but the DB facade.
stackoverflow  php  howto  example  guide  reference  convert  array  objects  associative  arrays  laravel  laravel5  model  object 
june 2018 by racl101
javascript - LoDash: Get an array of values from an array of object properties - Stack Overflow
Does the job that Laravel's Collection pluck method does for a key in an array of associative arrays.
stackoverflow  howto  get  array  of  properties  property  values  from  objects  pluck  lodash  _.map  map  example  guide  reference  javascript 
may 2018 by racl101
PHP: array_values - Manual
This method provides an easy way to convert associative arrays / hashes with numeric indexes that might not be consecutive into normal arrays with numeric indexes that start from zero until length of array minus 1.
php  manual  guide  reference  documentation  array_values  convert  array  associative  numeric  index 
may 2018 by racl101
Lodash Documentation
How to create an object that is composed from a given object's keys, use the Lodash _.pick method.
lodash  documentation  guide  reference  howto  pick  object  key  value  pairs  by  keys  _.pick  array  example 
april 2018 by racl101
python - How to access the ith column of a NumPy multidimensional array? - Stack Overflow
To split a 2D array into its columns the easiest approach is to transpose the array and get all the resulting rows, which, are in effect the columns of the original 2D array.
stackoverflow  howto  example  python  python2.7  get  columns  2d  array  two  dimension  rows  transpose  method  numpy  pandas 
april 2018 by racl101
Python: Append item to list N times - Stack Overflow
This would be the equivalent to PHP's array_fill method. Allows you to append to an existing array the same item n times.
stackoverflow  python  python2.7  howto  append  array  list  same  item  multiple  times  example  guide  reference 
april 2018 by racl101
python - NumPy array/matrix of mixed types - Stack Overflow
Helps with creating numpy arrays with mixed types. However, if you're looking to combine different multidimensional numpy arrays (with several rows and columns) into one large array of mixed types, don't use numpy.column_stack method because it will convert all of them to one type (convert ints into strings for example). Rather, use pandas concat method instead, which means you turn each multidimensional array into its own dataframe.
stackoverflow  howto  create  numpy  array  mixed  data  types  python  python2.7  example  guide  reference 
april 2018 by racl101
numpy.random.choice — NumPy v1.14 Manual
Numpy method for randomly choosing an item or more from a Python list (regular PHP, non-associative array).
numpy  python  python2.7  random  choice  method  pick  choose  item  list  array  documentation  guide  reference 
april 2018 by racl101
numpy.ndarray — NumPy v1.14 Manual
Numpy Array documentation. These arrays are special and have features that Python lists don’t.
numpy  python  python2.7  array  documentation  special  math  guide  reference  tutorial  toread  tolearn  tounderstand 
april 2018 by racl101
pandas.Series.tolist — pandas 0.22.0 documentation
Use this method to convert a row in a two dimensional Pandas data frame into a standard Python List (i.e. the PHP array equivalent, not associated array, but simply an index number based array.)
pandas  python  python2.7  guide  reference  documentation  convert  to  list  tolist  method  array 
april 2018 by racl101
PHP: array_reduce - Manual
This function is useful in situations where you need to deal with arrays of associative arrays with numeric keys and you want to merge them into one while preserving the numeric keys.

Like so, for example:

$arr1 = [ [ 1 => 'foo'], [3 => 'bar'], [7 => 'yo'], ..., [101 => 'dogg'] ];
$result = array_reduce($arr1, function ($carry, $item) { return $carry + $item; }, []);

This returns: [ 1 => 'foo', 3 => 'bar' .... 101 => 'dogg'];
php  manual  guide  reference  documentation  array_reduce  array  reduce  function  merging  tutorial  toread  tolearn  tounderstand 
march 2018 by racl101
JavaScript Array unshift() Method
Shows how to add item to beginning of array in JavaScript
w3schools  howto  example  javascript  array  add  item  beginning  guide  reference 
october 2017 by racl101
php - Get array values by keys - Stack Overflow
Shows how to get an array of values from a bigger array of values where the items returned are specified by an array of keys.
stackoverflow  howto  array_map  get  array  values  bigger  keys  php  example  guide  Reference 
september 2017 by racl101
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