Replace array value to increment
I have an array like this ...
[0,0,23,0,0,18,0,0]
Then I want to change values that are not '0' (23 & 18) to auto increment, so the end result will be like this,
[0,0,1,0,0,2,0,0]
is there the best way for all that?
So far this is what I did, but the results were not as expected ... :)
<?php
$arr = [0,0,23,0,0,18,0,0];
$x = 1;
$r = collect($arr)->map(function ($value, $key)use($x) {
if ($value == 0) {
return $value;
} else {
return $x++;
}
})->all();
dd($r);
php arrays
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
add a comment |
I have an array like this ...
[0,0,23,0,0,18,0,0]
Then I want to change values that are not '0' (23 & 18) to auto increment, so the end result will be like this,
[0,0,1,0,0,2,0,0]
is there the best way for all that?
So far this is what I did, but the results were not as expected ... :)
<?php
$arr = [0,0,23,0,0,18,0,0];
$x = 1;
$r = collect($arr)->map(function ($value, $key)use($x) {
if ($value == 0) {
return $value;
} else {
return $x++;
}
})->all();
dd($r);
php arrays
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
Show us some code!
– Brogan
Nov 13 '18 at 20:30
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28
add a comment |
I have an array like this ...
[0,0,23,0,0,18,0,0]
Then I want to change values that are not '0' (23 & 18) to auto increment, so the end result will be like this,
[0,0,1,0,0,2,0,0]
is there the best way for all that?
So far this is what I did, but the results were not as expected ... :)
<?php
$arr = [0,0,23,0,0,18,0,0];
$x = 1;
$r = collect($arr)->map(function ($value, $key)use($x) {
if ($value == 0) {
return $value;
} else {
return $x++;
}
})->all();
dd($r);
php arrays
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
I have an array like this ...
[0,0,23,0,0,18,0,0]
Then I want to change values that are not '0' (23 & 18) to auto increment, so the end result will be like this,
[0,0,1,0,0,2,0,0]
is there the best way for all that?
So far this is what I did, but the results were not as expected ... :)
<?php
$arr = [0,0,23,0,0,18,0,0];
$x = 1;
$r = collect($arr)->map(function ($value, $key)use($x) {
if ($value == 0) {
return $value;
} else {
return $x++;
}
})->all();
dd($r);
php arrays
php arrays
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
edited Nov 13 '18 at 21:30
Don't Panic
28.9k93856
28.9k93856
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
asked Nov 13 '18 at 20:27
Cristal TravelCristal Travel
383
383
What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
Show us some code!
– Brogan
Nov 13 '18 at 20:30
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28
add a comment |
What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
Show us some code!
– Brogan
Nov 13 '18 at 20:30
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28
What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
Show us some code!
– Brogan
Nov 13 '18 at 20:30
Show us some code!
– Brogan
Nov 13 '18 at 20:30
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28
add a comment |
2 Answers
2
active
oldest
votes
The problem is that when you have your value of $x passed into the function via use, this isn't allowing the value to be updated. You need to pass it by reference - use (&$x) to allow it to increment the value outside the function...
$r = collect($arr)->map(function ($value, $key) use (&$x) {
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
add a comment |
Another way... Using foreach with reference of array &
With Passed by Reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as &$val){
if($val !== 0){
$val = $counter++;
}
}
print_r($arr);
Note: Be aware of dangling reference
Without reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as $key => $val){
if($val !== 0){
$arr[$key] = $counter++;
}
}
print_r($arr);
Output
Array
(
[0] => 0
[1] => 0
[2] => 1
[3] => 0
[4] => 0
[5] => 2
[6] => 0
[7] => 0
)
Live demo
Pass by reference docs
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
$val = $counter++;or$val = ++$counter;saves you a line of code. ;)
– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
|
show 7 more comments
Your Answer
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
The problem is that when you have your value of $x passed into the function via use, this isn't allowing the value to be updated. You need to pass it by reference - use (&$x) to allow it to increment the value outside the function...
$r = collect($arr)->map(function ($value, $key) use (&$x) {
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
add a comment |
The problem is that when you have your value of $x passed into the function via use, this isn't allowing the value to be updated. You need to pass it by reference - use (&$x) to allow it to increment the value outside the function...
$r = collect($arr)->map(function ($value, $key) use (&$x) {
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
add a comment |
The problem is that when you have your value of $x passed into the function via use, this isn't allowing the value to be updated. You need to pass it by reference - use (&$x) to allow it to increment the value outside the function...
$r = collect($arr)->map(function ($value, $key) use (&$x) {
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
The problem is that when you have your value of $x passed into the function via use, this isn't allowing the value to be updated. You need to pass it by reference - use (&$x) to allow it to increment the value outside the function...
$r = collect($arr)->map(function ($value, $key) use (&$x) {
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
answered Nov 13 '18 at 20:43
Nigel RenNigel Ren
27.2k61833
27.2k61833
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
add a comment |
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
Thank you very much @Nigel, this really saved my day...
– Cristal Travel
Nov 13 '18 at 20:49
add a comment |
Another way... Using foreach with reference of array &
With Passed by Reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as &$val){
if($val !== 0){
$val = $counter++;
}
}
print_r($arr);
Note: Be aware of dangling reference
Without reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as $key => $val){
if($val !== 0){
$arr[$key] = $counter++;
}
}
print_r($arr);
Output
Array
(
[0] => 0
[1] => 0
[2] => 1
[3] => 0
[4] => 0
[5] => 2
[6] => 0
[7] => 0
)
Live demo
Pass by reference docs
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
$val = $counter++;or$val = ++$counter;saves you a line of code. ;)
– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
|
show 7 more comments
Another way... Using foreach with reference of array &
With Passed by Reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as &$val){
if($val !== 0){
$val = $counter++;
}
}
print_r($arr);
Note: Be aware of dangling reference
Without reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as $key => $val){
if($val !== 0){
$arr[$key] = $counter++;
}
}
print_r($arr);
Output
Array
(
[0] => 0
[1] => 0
[2] => 1
[3] => 0
[4] => 0
[5] => 2
[6] => 0
[7] => 0
)
Live demo
Pass by reference docs
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
$val = $counter++;or$val = ++$counter;saves you a line of code. ;)
– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
|
show 7 more comments
Another way... Using foreach with reference of array &
With Passed by Reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as &$val){
if($val !== 0){
$val = $counter++;
}
}
print_r($arr);
Note: Be aware of dangling reference
Without reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as $key => $val){
if($val !== 0){
$arr[$key] = $counter++;
}
}
print_r($arr);
Output
Array
(
[0] => 0
[1] => 0
[2] => 1
[3] => 0
[4] => 0
[5] => 2
[6] => 0
[7] => 0
)
Live demo
Pass by reference docs
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
Another way... Using foreach with reference of array &
With Passed by Reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as &$val){
if($val !== 0){
$val = $counter++;
}
}
print_r($arr);
Note: Be aware of dangling reference
Without reference
Snippet
$arr = [0,0,23,0,0,18,0,0];
$counter = 1;
foreach ($arr as $key => $val){
if($val !== 0){
$arr[$key] = $counter++;
}
}
print_r($arr);
Output
Array
(
[0] => 0
[1] => 0
[2] => 1
[3] => 0
[4] => 0
[5] => 2
[6] => 0
[7] => 0
)
Live demo
Pass by reference docs
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
edited Nov 14 '18 at 9:21
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
answered Nov 13 '18 at 20:51
SmartpalSmartpal
962516
962516
$val = $counter++;or$val = ++$counter;saves you a line of code. ;)
– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
|
show 7 more comments
$val = $counter++;or$val = ++$counter;saves you a line of code. ;)
– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
$val = $counter++; or $val = ++$counter; saves you a line of code. ;)– dn Fer
Nov 13 '18 at 21:13
$val = $counter++; or $val = ++$counter; saves you a line of code. ;)– dn Fer
Nov 13 '18 at 21:13
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
@dnFer error occurred
– Smartpal
Nov 13 '18 at 21:26
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
Not when I change your demo.
– dn Fer
Nov 13 '18 at 21:30
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
@dnFer Link modified demo
– Smartpal
Nov 13 '18 at 21:33
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
3v4l.org/eIEhe
– dn Fer
Nov 13 '18 at 21:41
|
show 7 more comments
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What have you tried so far?
– Nigel Ren
Nov 13 '18 at 20:27
Show us some code!
– Brogan
Nov 13 '18 at 20:30
If you increment 23, does that not become 24?
– Progrock
Nov 13 '18 at 20:32
Out of curiosity... what's function collect?
– dn Fer
Nov 13 '18 at 21:08
@dnFer I think it's probably this.
– Don't Panic
Nov 13 '18 at 21:28