Mixing
PHP array: Conditional sum
0
I have a an array looking like this:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
I would like to sum values foreach "unique" key when only the first character is considered. The result should then be:
$newarray = array("a" => 3, "b" => 5);
I have tried using a foreach() loop within another foreach() loop like this:
foreach ($xml->children() as $output) {
foreach ($array as $key => $value) {
if (substr($key,0,1) == $output->KEY) {
$sum += $value; echo $sum;
}
}
}
It didn't work as the results apparently added the prior calculations.
php arrays calculation
edited Jan 3 at 2:40
Alive to Die
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
add a comment |
0
I have a an array looking like this:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
I would like to sum values foreach "unique" key when only the first character is considered. The result should then be:
$newarray = array("a" => 3, "b" => 5);
I have tried using a foreach() loop within another foreach() loop like this:
foreach ($xml->children() as $output) {
foreach ($array as $key => $value) {
if (substr($key,0,1) == $output->KEY) {
$sum += $value; echo $sum;
}
}
}
It didn't work as the results apparently added the prior calculations.
php arrays calculation
edited Jan 3 at 2:40
Alive to Die
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
add a comment |
0
0
0
I have a an array looking like this:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
I would like to sum values foreach "unique" key when only the first character is considered. The result should then be:
$newarray = array("a" => 3, "b" => 5);
I have tried using a foreach() loop within another foreach() loop like this:
foreach ($xml->children() as $output) {
foreach ($array as $key => $value) {
if (substr($key,0,1) == $output->KEY) {
$sum += $value; echo $sum;
}
}
}
It didn't work as the results apparently added the prior calculations.
php arrays calculation
edited Jan 3 at 2:40
Alive to Die
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
I have a an array looking like this:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
I would like to sum values foreach "unique" key when only the first character is considered. The result should then be:
$newarray = array("a" => 3, "b" => 5);
I have tried using a foreach() loop within another foreach() loop like this:
foreach ($xml->children() as $output) {
foreach ($array as $key => $value) {
if (substr($key,0,1) == $output->KEY) {
$sum += $value; echo $sum;
}
}
}
It didn't work as the results apparently added the prior calculations.
php arrays calculation
php arrays calculation
edited Jan 3 at 2:40
Alive to Die
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
edited Jan 3 at 2:40
Alive to Die
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
edited Jan 3 at 2:40
Alive to Die
56k83273
edited Jan 3 at 2:40
Alive to Die
56k83273
edited Jan 3 at 2:40
Alive to Die
56k83273
56k83273
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
asked Jan 2 at 13:52
McClaudLiveMcClaudLive
186
186
add a comment |
add a comment |
5 Answers
5
active
oldest
votes
1
You can try this one. It will take first letter from your key and make sum of all values with that first letter keys.
<?php
$sum = ;
foreach ($array as $key => $value) {
$letter = substr($key,0,1);
if (!isset($sum[$letter])){$sum[$letter] = 0;}
$sum[$letter] += $value;
}
var_dump($sum);
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
1
@executable only the first character needs to be considered for OP. Even if$key = 'ab';this would result in$letter = 'a';sincesubstr($key, 0, 1)return the first character
– G4Hu
Jan 2 at 14:10
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
add a comment |
2
Simple solution:
$final_array=;
foreach($array as $key=>$value){
$final_array[$key[0]] = (isset($final_array[$key[0]])) ? $final_array[$key[0]]+$value : $value;
}
print_r($final_array);
Output:- https://3v4l.org/tZ4Ei
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
add a comment |
1
A simple isset should do it:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
$result = array();
foreach ($array as $oldkey => $val) {
$newkey = substr($oldkey, 0, 1);
if (isset($result[$newkey]) === false)
$result[$newkey] = $val;
else
$result[$newkey] += $val;
}
var_dump($result);
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
add a comment |
1
Try this way
$array = array('a1' => 0, 'a2' => 2, 'a3' => 3, 'b1' => 2, 'b2' => 3);
$result = array();
foreach($array as $key => $value){
if(isset($result[$key[0]])){
$result[$key[0]] = $result[$key[0]]+$value;
} else {
$result[$key[0]] = $value;
}
}
print_r($result);
edited Jan 2 at 14:46
executable
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
1
You have a missing)in your condition
– executable
Jan 2 at 14:03
add a comment |
0
Quick and Easy, you can have any number of numbers in the array after the characters.
<?php
$array = ["a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3];
$newArray = ;
foreach ($array as $key => $value) {
$key = preg_replace("/[0-9]*$/", "", $key);
$newArray[$key] = (isset($newArray[$key])) ? $newArray[$key] + $value : $value;
}
print_r($newArray);
answered Jan 2 at 14:03
AnugaAnuga
1,069719
add a comment |
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5 Answers
5
active
oldest
votes
5 Answers
5
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
You can try this one. It will take first letter from your key and make sum of all values with that first letter keys.
<?php
$sum = ;
foreach ($array as $key => $value) {
$letter = substr($key,0,1);
if (!isset($sum[$letter])){$sum[$letter] = 0;}
$sum[$letter] += $value;
}
var_dump($sum);
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
1
@executable only the first character needs to be considered for OP. Even if$key = 'ab';this would result in$letter = 'a';sincesubstr($key, 0, 1)return the first character
– G4Hu
Jan 2 at 14:10
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
add a comment |
1
You can try this one. It will take first letter from your key and make sum of all values with that first letter keys.
<?php
$sum = ;
foreach ($array as $key => $value) {
$letter = substr($key,0,1);
if (!isset($sum[$letter])){$sum[$letter] = 0;}
$sum[$letter] += $value;
}
var_dump($sum);
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
1
@executable only the first character needs to be considered for OP. Even if$key = 'ab';this would result in$letter = 'a';sincesubstr($key, 0, 1)return the first character
– G4Hu
Jan 2 at 14:10
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
add a comment |
1
1
1
You can try this one. It will take first letter from your key and make sum of all values with that first letter keys.
<?php
$sum = ;
foreach ($array as $key => $value) {
$letter = substr($key,0,1);
if (!isset($sum[$letter])){$sum[$letter] = 0;}
$sum[$letter] += $value;
}
var_dump($sum);
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
You can try this one. It will take first letter from your key and make sum of all values with that first letter keys.
<?php
$sum = ;
foreach ($array as $key => $value) {
$letter = substr($key,0,1);
if (!isset($sum[$letter])){$sum[$letter] = 0;}
$sum[$letter] += $value;
}
var_dump($sum);
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
answered Jan 2 at 13:58
JohnnyB1988JohnnyB1988
1467
1467
1
@executable only the first character needs to be considered for OP. Even if$key = 'ab';this would result in$letter = 'a';sincesubstr($key, 0, 1)return the first character
– G4Hu
Jan 2 at 14:10
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
add a comment |
1
@executable only the first character needs to be considered for OP. Even if$key = 'ab';this would result in$letter = 'a';sincesubstr($key, 0, 1)return the first character
– G4Hu
Jan 2 at 14:10
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
1
1
@executable only the first character needs to be considered for OP. Even if
$key = 'ab'; this would result in $letter = 'a'; since substr($key, 0, 1) return the first character– G4Hu
Jan 2 at 14:10
@executable only the first character needs to be considered for OP. Even if
$key = 'ab'; this would result in $letter = 'a'; since substr($key, 0, 1) return the first character– G4Hu
Jan 2 at 14:10
2
2
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
Author asked just with first character " sum values foreach "unique" key when only the first character is considered" You can also validate key with ctype_alpha to check if it is letter, or number and by that result make additional decisions
– JohnnyB1988
Jan 2 at 14:10
add a comment |
2
Simple solution:
$final_array=;
foreach($array as $key=>$value){
$final_array[$key[0]] = (isset($final_array[$key[0]])) ? $final_array[$key[0]]+$value : $value;
}
print_r($final_array);
Output:- https://3v4l.org/tZ4Ei
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
add a comment |
2
Simple solution:
$final_array=;
foreach($array as $key=>$value){
$final_array[$key[0]] = (isset($final_array[$key[0]])) ? $final_array[$key[0]]+$value : $value;
}
print_r($final_array);
Output:- https://3v4l.org/tZ4Ei
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
add a comment |
2
2
2
Simple solution:
$final_array=;
foreach($array as $key=>$value){
$final_array[$key[0]] = (isset($final_array[$key[0]])) ? $final_array[$key[0]]+$value : $value;
}
print_r($final_array);
Output:- https://3v4l.org/tZ4Ei
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
Simple solution:
$final_array=;
foreach($array as $key=>$value){
$final_array[$key[0]] = (isset($final_array[$key[0]])) ? $final_array[$key[0]]+$value : $value;
}
print_r($final_array);
Output:- https://3v4l.org/tZ4Ei
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
edited Jan 3 at 8:29
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
answered Jan 2 at 14:11
Alive to DieAlive to Die
56k83273
56k83273
add a comment |
add a comment |
1
A simple isset should do it:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
$result = array();
foreach ($array as $oldkey => $val) {
$newkey = substr($oldkey, 0, 1);
if (isset($result[$newkey]) === false)
$result[$newkey] = $val;
else
$result[$newkey] += $val;
}
var_dump($result);
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
add a comment |
1
A simple isset should do it:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
$result = array();
foreach ($array as $oldkey => $val) {
$newkey = substr($oldkey, 0, 1);
if (isset($result[$newkey]) === false)
$result[$newkey] = $val;
else
$result[$newkey] += $val;
}
var_dump($result);
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
add a comment |
1
1
1
A simple isset should do it:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
$result = array();
foreach ($array as $oldkey => $val) {
$newkey = substr($oldkey, 0, 1);
if (isset($result[$newkey]) === false)
$result[$newkey] = $val;
else
$result[$newkey] += $val;
}
var_dump($result);
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
A simple isset should do it:
$array = array("a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3);
$result = array();
foreach ($array as $oldkey => $val) {
$newkey = substr($oldkey, 0, 1);
if (isset($result[$newkey]) === false)
$result[$newkey] = $val;
else
$result[$newkey] += $val;
}
var_dump($result);
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
edited Jan 2 at 14:00
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
answered Jan 2 at 13:58
Salman ASalman A
184k67343441
184k67343441
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
add a comment |
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
Damn it :D Just few seconds later
– JohnnyB1988
Jan 2 at 13:59
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@JohnnyB1988 To be precise two seconds later.
– CodeIt
Jan 2 at 14:18
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
@Salman I'm glad that my code is like yours, it means that my studies is on good way.
– JohnnyB1988
Jan 2 at 14:21
add a comment |
1
Try this way
$array = array('a1' => 0, 'a2' => 2, 'a3' => 3, 'b1' => 2, 'b2' => 3);
$result = array();
foreach($array as $key => $value){
if(isset($result[$key[0]])){
$result[$key[0]] = $result[$key[0]]+$value;
} else {
$result[$key[0]] = $value;
}
}
print_r($result);
edited Jan 2 at 14:46
executable
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
1
You have a missing)in your condition
– executable
Jan 2 at 14:03
add a comment |
1
Try this way
$array = array('a1' => 0, 'a2' => 2, 'a3' => 3, 'b1' => 2, 'b2' => 3);
$result = array();
foreach($array as $key => $value){
if(isset($result[$key[0]])){
$result[$key[0]] = $result[$key[0]]+$value;
} else {
$result[$key[0]] = $value;
}
}
print_r($result);
edited Jan 2 at 14:46
executable
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
1
You have a missing)in your condition
– executable
Jan 2 at 14:03
add a comment |
1
1
1
Try this way
$array = array('a1' => 0, 'a2' => 2, 'a3' => 3, 'b1' => 2, 'b2' => 3);
$result = array();
foreach($array as $key => $value){
if(isset($result[$key[0]])){
$result[$key[0]] = $result[$key[0]]+$value;
} else {
$result[$key[0]] = $value;
}
}
print_r($result);
edited Jan 2 at 14:46
executable
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
Try this way
$array = array('a1' => 0, 'a2' => 2, 'a3' => 3, 'b1' => 2, 'b2' => 3);
$result = array();
foreach($array as $key => $value){
if(isset($result[$key[0]])){
$result[$key[0]] = $result[$key[0]]+$value;
} else {
$result[$key[0]] = $value;
}
}
print_r($result);
edited Jan 2 at 14:46
executable
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
edited Jan 2 at 14:46
executable
1,9452924
edited Jan 2 at 14:46
executable
1,9452924
edited Jan 2 at 14:46
executable
1,9452924
1,9452924
answered Jan 2 at 14:00
TamimTamim
320511
answered Jan 2 at 14:00
TamimTamim
320511
answered Jan 2 at 14:00
TamimTamim
320511
320511
1
You have a missing)in your condition
– executable
Jan 2 at 14:03
add a comment |
1
You have a missing)in your condition
– executable
Jan 2 at 14:03
1
1
You have a missing
) in your condition– executable
Jan 2 at 14:03
You have a missing
) in your condition– executable
Jan 2 at 14:03
add a comment |
0
Quick and Easy, you can have any number of numbers in the array after the characters.
<?php
$array = ["a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3];
$newArray = ;
foreach ($array as $key => $value) {
$key = preg_replace("/[0-9]*$/", "", $key);
$newArray[$key] = (isset($newArray[$key])) ? $newArray[$key] + $value : $value;
}
print_r($newArray);
answered Jan 2 at 14:03
AnugaAnuga
1,069719
add a comment |
0
Quick and Easy, you can have any number of numbers in the array after the characters.
<?php
$array = ["a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3];
$newArray = ;
foreach ($array as $key => $value) {
$key = preg_replace("/[0-9]*$/", "", $key);
$newArray[$key] = (isset($newArray[$key])) ? $newArray[$key] + $value : $value;
}
print_r($newArray);
answered Jan 2 at 14:03
AnugaAnuga
1,069719
add a comment |
0
0
0
Quick and Easy, you can have any number of numbers in the array after the characters.
<?php
$array = ["a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3];
$newArray = ;
foreach ($array as $key => $value) {
$key = preg_replace("/[0-9]*$/", "", $key);
$newArray[$key] = (isset($newArray[$key])) ? $newArray[$key] + $value : $value;
}
print_r($newArray);
answered Jan 2 at 14:03
AnugaAnuga
1,069719
Quick and Easy, you can have any number of numbers in the array after the characters.
<?php
$array = ["a1" => 0, "a2" => 2, "a3" => 1, "b1" => 2, "b2" => 3];
$newArray = ;
foreach ($array as $key => $value) {
$key = preg_replace("/[0-9]*$/", "", $key);
$newArray[$key] = (isset($newArray[$key])) ? $newArray[$key] + $value : $value;
}
print_r($newArray);
answered Jan 2 at 14:03
AnugaAnuga
1,069719
answered Jan 2 at 14:03
AnugaAnuga
1,069719
answered Jan 2 at 14:03
AnugaAnuga
1,069719
answered Jan 2 at 14:03
AnugaAnuga
1,069719
1,069719
add a comment |
add a comment |
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