An associative array is an abstract data type composed of a collection of unique keys mapped to a collection of values.
1
vote
1answer
36 views
Why can't I reference keys in the result of this PHP function? [duplicate]
Why does this code fail
function f(){
return array('k'=>'abc');
}
print_r(f()['k']);
and this code work?
function f(){
return array('k'=>'abc');
}
$a = f();
print_r($a['k']);
The ...
1
vote
6answers
33 views
Insert a element from php variable in associative array
I have a conditional string like this:
echo $cnd = "'use_funds'=>'no'";
And my $data array is :
$data = array(
$cnd,
'quantity' => $_POST['qty_' . $q],
'veg_name' => ...
0
votes
4answers
37 views
In PHP, filter an Array of Associative Arrays
In PHP, are there any inbuilt functions to turn
[{"id":1, "name":"John"}, {"id":2, "name":"Tim"}]
into
[{"id":1}, {"id":2}]
?
I've used JSON to describe the objects above, but that's just a ...
0
votes
1answer
21 views
Merging two arrays then sorting them
Beginner here. I have two arrays, one that contains my values($m1) and the other contains what I want to use as keys($pn) (non unique strings). They have the same length (465) and $pn[0] is the key ...
0
votes
2answers
26 views
Ordered Map / Hash Table in R
While working with lists i've noticed an issue that i didn't expect.
result5 <- vector("list",length(queryResults[[1]]))
for(i in 1:length(queryResults[[1]])){
id <- queryResults[[1]][i]
...
0
votes
3answers
36 views
Creating an associative array with strings
I read some words from a text file, storing each word as an array element using the file() function. Now I need to sort each word and create an associative array that stores the sorted strings as keys ...
0
votes
2answers
19 views
custom validation class only testing last element
I have been trying to make a custom validation class, but it is bothering me that it only is test thing last element it sees. I need it to test everything I put into it.
<?php
class Valid {
...
0
votes
1answer
24 views
Trace hierarchical tree for JSON array
I just can't understand why I get undefined index for 'post' in the foreach. Here's the function I use to authenticate to the API via cURL, grab the JSON, cache it and extrapolate with the foreach the ...
0
votes
2answers
25 views
calling values from JSON associative array in JQUERY
I'm attempting to call values from a JSON associative array. I'm finding difficulties as my object is wrapped in "[ ]". For instance:
var scifi = [
{
"Show":"TNG",
...
0
votes
1answer
15 views
PHP: Find dynamic element from nested associated array
I'm working on a function that looks like this:
public function myfunction($mainArr, $keys) {
// $mainArr: a nested associative array
// $keys: a simple array of strings, example: ...
-7
votes
1answer
46 views
Associative array
I have two arrays:
arr1([0]=>1400.20
[1]=>1630.32
[2]=>2531.30
[3]=>9845.62)
arr2([0]=>150
[1]=>134
[2]=>901
[3]=>631)
and I have ...
0
votes
1answer
31 views
PHP: pushing new data (including new key) in associative array
So I am trying to push new data into an array. This data inlcudes new key values.
This is what I am using now, however this will always overwrite the last with the newer in stead of adding a row to ...
0
votes
2answers
20 views
using php class object like associative array [duplicate]
so i'm having this class:
class c_user
{
function __construct($userID)
{
dbOpen($db); // open database
$sq = "select * from users where user_id='".$userID."'";
$rs = ...
-2
votes
1answer
40 views
Storing true or false into an associative array
I've compiled a list of 'old browsers'. I'm doing a check on each one to see if they are in the HTTP_USER_AGENT. My results keep storing as true in the array even when they're false.
My problem ...
1
vote
3answers
37 views
Failed to print what is stored in Iterator
// unordered_map::find
#include <iostream>
#include <string>
#include <unordered_map>
using namespace std;
int main ()
{
std::unordered_map<std::string,double> mymap;
...
