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Questions tagged [associative]

This tag is used mostly regarding associative arrays (but better use tag "associative-array" for that) and sometimes in the mathematic sense of tag "associativity", the associative property of binary operations.

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simple 1D example showing convolution vs correlation to test commutative/associative property

So I've known this fact that convolution has commutative/associative property while correlation does not but never really written out a simple example to test this out. (proofs in equation forms exist out there) I was just trying this simple…
Han Brian Lee
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JavaScript Object efficient for an associate array (AKA Map)? What alternatives are there?

I am new to JavaScript and lately been coding in PHP which I am looking to port to JavaScript. PHP has a Map implemented directly into its Array container class, which does not exists in the default language of JavaScript. Everyone I seem to read…
j_p
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bash - associative array subscript - "not a valid identifier"

Does bash impose constraints on the characters used in associative-array subscripts? I have successfully used string subscripts that include spaces, but am tripping on a (bug?) when the subscript includes a quotation mark. bash-5.0$ declare -A…
David
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I can't get a value to stay in my $_SESSION variable

I am trying to get values out of an indexed array, but when I use a variable as the index (which is equal to an index in the array), it does not appear. I get an Undefined Index Error. Why is this happening? Does anyone know? Thanks! I have the…
EGr
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How to associate and filter two related arrays?

I have two arrays and I want to link together when processing them. $dat = array( "2020-02-01", "2020-02-05", "2020-02-10", "2020-02-12", "2020-02-15" ); $word = array( "Attend To,Explore,Unaided,dull,bad" ); //User…
user13465228
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Converting a json object to an associative array

I have this array which is retrieved by a json_encode().When I execute $.getJSON('beta.php' , function(data){ console.log(data); }); I get the result as follows [ Object { StuId="1", fName="Saman", more...}, Object { StuId="2", fName="Marry",…
SriniShine
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Multiple values for a key in ksh

I'm trying to read a file which is in pairs as follows: V1#K1.@ V2#K1.@ V3#K2.@,V4#K1.@,V5#K2 V1#K3.@ My aim is to store it in key<=>pairs with # as a delimiter after removing '@' Value is placed before # and Keys are after # in the example…
anurag86
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Send data from an Object to a React Component

Access to data inside an object to send it to a React Component I'm trying to recover data inside an object which looks like this : {89: {…}, 91: {…}, 92: {…}} 89: {name: "Confiture de Myrtilles", product_id: "737", _wc_review_count: "0",…
Julien Txerriak Guillou
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Access bash associate array via variable indirection

I wish to access an associative array using a variable. The example in the accepted answer to this post is exactly what I want: $ declare -A FIRST=( [hello]=world [foo]=bar ) $ alias=FIRST $ echo "${!alias[foo]}" however this does not work for me…
John
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Creating associative array from object

I currently have an array that is building with the correct data by looping an object but it's giving the incorrect format: $priceResult = array(); foreach($prices->categories as $category){ $priceResult[] = $category->category_name; …
Geoff_S
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How to get column names and values from a single-row resultset with PDO?

I need to get all column names and values in the row where id = $id. Column names should be echoed as title; values should be echoed as story Something like this: function story($id) { global $db; $sql = "select * from users where id =…
user7461846
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Functor associative law confusion

I've been confused by associative law of functor(Endofunctor) for weeks. I know every endofunctor forms composition/associative feature. Composition is associative. Basically that means that when you’re composing multiple functions (morphisms if…
user6440264
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Associative Lists in Prolog

my task is to implement maps with lists. We defined associative lists as follows: [] is the list, k is a key, v is a value and a is an associative list, then [[k, v] | a] is an associative list. so now ive got to write a predicate, in which it…
Sleeyz
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PHP Transform mixed sequential and associative array to associative array

I would like to build $goal array from $initial only. Any ideas? Thank you Edit : the question could be how to differentiate associative parts from sequential ones. $intial=[ "one", "two"=>"myTwo", "three", …
tit
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