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# Multiply each item in an array by each item in another array

By : sriraaj09
Date : October 16 2020, 08:10 PM
hope this fix your issue This is not beautiful but returns what you want.
a.map{|aa| b.map{|bb| bb * aa}}.flatten
code :

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## How can I multiply each item in an array easily with PHP?

By : user1924954
Date : March 29 2020, 07:55 AM
wish helps you I have an array called \$times. It is a list of small numbers (15,14,11,9,3,2). These will be user submitted and are supposed to be minutes. As PHP time works on seconds, I would like to multiply each element of my array by 60. , Just iterate over the array with the foreach statement and multiply:
code :
``````foreach (\$times as \$value) {

\$new_times[] = \$value * 60;

}
``````

## Multiply a 180x360 array by a 156-item time-series to get 180x360x156 array?

By : Sakshi
Date : March 29 2020, 07:55 AM
I hope this helps you . You can't have mismatched non-singleton dimensions. Permute the second argument. Assuming A is a m-by-n matrix and B is a (p-by-1) column vector:
code :
``````A = rand(6,5); B = rand(4,1);
% m-by-n @times 1-by-1-by-p => m-by-n-by-p
C = bsxfun(@times,A,permute(B,[3 2 1]));
size(C)
ans =
6     5     4
``````

## How can I multiply every item in array using lambda?

By : NaahsTea
Date : March 29 2020, 07:55 AM
around this issue I want to multiply every item in this array:
code :
``````la = ->e{e * 2}
arr.map!(&la)
``````
``````arr.map!{|e| e * 2}
``````

## Multiply two key values for each array item

By : Pranay Garg
Date : March 29 2020, 07:55 AM
it helps some times Get price of each item into an array, then finally sum it up using array_sum() -
code :
``````\$eachPrice = array();
foreach (\$items as \$key => \$val) {
\$eachPrice[] = \$val['Price'] * \$val['Quantity'];
}

\$totalPrice = array_sum(\$eachPrice);

var_dump(\$totalPrice); // should be total price of all items
``````

## How can I multiply all item in an array with laravel?

By : user1454387
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further i have array in controller with output like this , Put your data in string and decode in JSON:
code :
``````\$data = '{
"usia": 0.01761252446184,
"wife_education": 0.078277886497065,
"husband_education": 0.0058708414872798,
"number_of_children": 0.17025440313112,
"wife_religion": 0.86497064579256,
"wife_now_working": 0.078277886497065,
"husband_occupation": 0.23874755381605,
"living_index": 0.078277886497065,
"media_exposure": 0.048923679060665
}';

\$data = json_decode(\$data, true);
``````
``````\$product = 1;
foreach (\$data as \$key => \$value) {
\$product *= \$value;
}
``````