PHP array merge on Inner keys -


i have 2 arrays like:

$a = [     0 => [         'price' => 5.5     ],     1 => [         'price' => 6.0     ],     2 => [         'price' => 6.2     ],     3 => [         'price' => 6.5     ], ];  $b = [     0 => [         'color' => 'red'     ],     1 => [         'color' => 'white'     ],     2 => [         'color' => 'blue'     ],     3 => [         'color' => 'red'     ], ];

i should have response:

array (     [0] => array         (             [price] => 5.5             [color] => red         )     [1] => array         (             [price] => 6             [color] => white         )     [2] => array         (             [price] => 6.2             [color] => blue         )     [3] => array         (             [price] => 6.5             [color] => red         ) )

i heard function: array_merge_recursive response wasn't requiered:

array (     [0] => array         (             [price] => 5.5         )     [1] => array         (             [price] => 6         )     [2] => array         (             [price] => 6.2         )     [3] => array         (             [price] => 6.5         )     [4] => array         (             [color] => red         )     [5] => array         (             [color] => white         )      [6] => array         (             [color] => blue         )     [7] => array         (             [color] => red         )     )

so decided write own function: 

function merge ($a, $b) {     $keys = array_keys($a);     foreach ($keys $value) {         if (isset($b[$value])) {             $tmp = array_keys($b[$value]);             foreach ($tmp $val){                 $a[$value][$val] = $b[$value][$val];             }         }     }     return $a; } print_r(merge($a, $b));

and got proper response:

array (     [0] => array         (             [price] => 5.5             [color] => red         )     [1] => array         (             [price] => 6             [color] => white         )     [2] => array         (             [price] => 6.2             [color] => blue         )     [3] => array         (             [price] => 6.5             [color] => red         ) )

the problem works fine little arrays doesn't work big arrays, question is: how optimize function? because complexity grow depending on merged keys.

using php 7.0

you can use array_replace_recursive() instead.

array_replace_recursive($a, $b);

demo: https://3v4l.org/bfiz2


Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more