Can this PHP statement with a isset() check be simplified?
Needing to check whether the item exists in the array and either add to it or increase the value by the amount.
if(isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] += $amount;
}else{
$this->_costRemovedByLineItem[$objectId] = $amount;
}
I have a feeling this can be simplified.
php
add a comment |
Needing to check whether the item exists in the array and either add to it or increase the value by the amount.
if(isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] += $amount;
}else{
$this->_costRemovedByLineItem[$objectId] = $amount;
}
I have a feeling this can be simplified.
php
What version of PHP?
– Nick
4 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago
add a comment |
Needing to check whether the item exists in the array and either add to it or increase the value by the amount.
if(isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] += $amount;
}else{
$this->_costRemovedByLineItem[$objectId] = $amount;
}
I have a feeling this can be simplified.
php
Needing to check whether the item exists in the array and either add to it or increase the value by the amount.
if(isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] += $amount;
}else{
$this->_costRemovedByLineItem[$objectId] = $amount;
}
I have a feeling this can be simplified.
php
php
asked 4 hours ago
lukemhlukemh
2,15762135
2,15762135
What version of PHP?
– Nick
4 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago
add a comment |
What version of PHP?
– Nick
4 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago
What version of PHP?
– Nick
4 hours ago
What version of PHP?
– Nick
4 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago
add a comment |
3 Answers
3
active
oldest
votes
This method reduces it a bit, as you don't need the else statement or to assign amount twice.
if(!isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] = 0;
}
$this->_costRemovedByLineItem[$objectId] += $amount;
add a comment |
Something that will work in all versions of PHP:
@$this->_costRemovedByLineItem[$objectId] += $amount;
The @
(error control operator) will cause PHP to ignore the error caused by the non-existent index, create the element (with an empty value) and then add $amount
to it, resulting in a value of $amount
(as the empty value gets converted to 0 as a number).
Warning use of the
@
operator could potentially make it harder to debug
your code, as it will hide error messages that you may have
needed to see (for example, even if$this
doesn't exist, or there is
no object element called_costRemovedByLineItem
, PHP will create
them along with the array). See the third case in my example code.
Alternatively in PHP7 you can use the Null Coalescing Operator
:
$this->_costRemovedByLineItem[$objectId] = ($this->_costRemovedByLineItem[$objectId] ?? 0) + $amount;
And in PHP < 7 you can use the ternary operator
$this->_costRemovedByLineItem[$objectId] = (isset($this->_costRemovedByLineItem[$objectId]) ? $this->_costRemovedByLineItem[$objectId] : 0) + $amount;
A shorter example of each:
$amount = 4;
@$a[5] += $amount;
print_r($a);
$b[6] = ($b[6] ?? 0) + $amount;
print_r($b);
@$c->x[5] += $amount;
print_r($c);
$d[3] = (isset($d[3]) ? $d[3] : 0) + $amount;
print_r($d);
Output:
Array ( [5] => 4 )
Array ( [6] => 4 )
stdClass Object (
[x] => Array ( [5] => 4 )
)
Array ( [3] => 4 )
Demo on 3v4l.org
Now that is nice
– Siavas
3 hours ago
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX
– Devon
3 hours ago
@Devon the failure in your demo occurs when_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.
– Nick
3 hours ago
add a comment |
Ternary operators!
$this->_costRemovedByLineItem[$objectId] =
(isset($this->_costRemovedByLineItem[$objectId])) ?
$this->_costRemovedByLineItem[$objectId] + $amount :
$amount;
One sec... is this actually simpler?
But maybe...
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?? 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
This is for PHP 7+ only though. Or if you don't mind E_NOTICEs, from PHP 5.3:
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?: 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
One sec... this we just make the code harder to understand with not much improved?
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
This method reduces it a bit, as you don't need the else statement or to assign amount twice.
if(!isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] = 0;
}
$this->_costRemovedByLineItem[$objectId] += $amount;
add a comment |
This method reduces it a bit, as you don't need the else statement or to assign amount twice.
if(!isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] = 0;
}
$this->_costRemovedByLineItem[$objectId] += $amount;
add a comment |
This method reduces it a bit, as you don't need the else statement or to assign amount twice.
if(!isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] = 0;
}
$this->_costRemovedByLineItem[$objectId] += $amount;
This method reduces it a bit, as you don't need the else statement or to assign amount twice.
if(!isset($this->_costRemovedByLineItem[$objectId])) {
$this->_costRemovedByLineItem[$objectId] = 0;
}
$this->_costRemovedByLineItem[$objectId] += $amount;
answered 4 hours ago
DevonDevon
22.8k42746
22.8k42746
add a comment |
add a comment |
Something that will work in all versions of PHP:
@$this->_costRemovedByLineItem[$objectId] += $amount;
The @
(error control operator) will cause PHP to ignore the error caused by the non-existent index, create the element (with an empty value) and then add $amount
to it, resulting in a value of $amount
(as the empty value gets converted to 0 as a number).
Warning use of the
@
operator could potentially make it harder to debug
your code, as it will hide error messages that you may have
needed to see (for example, even if$this
doesn't exist, or there is
no object element called_costRemovedByLineItem
, PHP will create
them along with the array). See the third case in my example code.
Alternatively in PHP7 you can use the Null Coalescing Operator
:
$this->_costRemovedByLineItem[$objectId] = ($this->_costRemovedByLineItem[$objectId] ?? 0) + $amount;
And in PHP < 7 you can use the ternary operator
$this->_costRemovedByLineItem[$objectId] = (isset($this->_costRemovedByLineItem[$objectId]) ? $this->_costRemovedByLineItem[$objectId] : 0) + $amount;
A shorter example of each:
$amount = 4;
@$a[5] += $amount;
print_r($a);
$b[6] = ($b[6] ?? 0) + $amount;
print_r($b);
@$c->x[5] += $amount;
print_r($c);
$d[3] = (isset($d[3]) ? $d[3] : 0) + $amount;
print_r($d);
Output:
Array ( [5] => 4 )
Array ( [6] => 4 )
stdClass Object (
[x] => Array ( [5] => 4 )
)
Array ( [3] => 4 )
Demo on 3v4l.org
Now that is nice
– Siavas
3 hours ago
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX
– Devon
3 hours ago
@Devon the failure in your demo occurs when_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.
– Nick
3 hours ago
add a comment |
Something that will work in all versions of PHP:
@$this->_costRemovedByLineItem[$objectId] += $amount;
The @
(error control operator) will cause PHP to ignore the error caused by the non-existent index, create the element (with an empty value) and then add $amount
to it, resulting in a value of $amount
(as the empty value gets converted to 0 as a number).
Warning use of the
@
operator could potentially make it harder to debug
your code, as it will hide error messages that you may have
needed to see (for example, even if$this
doesn't exist, or there is
no object element called_costRemovedByLineItem
, PHP will create
them along with the array). See the third case in my example code.
Alternatively in PHP7 you can use the Null Coalescing Operator
:
$this->_costRemovedByLineItem[$objectId] = ($this->_costRemovedByLineItem[$objectId] ?? 0) + $amount;
And in PHP < 7 you can use the ternary operator
$this->_costRemovedByLineItem[$objectId] = (isset($this->_costRemovedByLineItem[$objectId]) ? $this->_costRemovedByLineItem[$objectId] : 0) + $amount;
A shorter example of each:
$amount = 4;
@$a[5] += $amount;
print_r($a);
$b[6] = ($b[6] ?? 0) + $amount;
print_r($b);
@$c->x[5] += $amount;
print_r($c);
$d[3] = (isset($d[3]) ? $d[3] : 0) + $amount;
print_r($d);
Output:
Array ( [5] => 4 )
Array ( [6] => 4 )
stdClass Object (
[x] => Array ( [5] => 4 )
)
Array ( [3] => 4 )
Demo on 3v4l.org
Now that is nice
– Siavas
3 hours ago
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX
– Devon
3 hours ago
@Devon the failure in your demo occurs when_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.
– Nick
3 hours ago
add a comment |
Something that will work in all versions of PHP:
@$this->_costRemovedByLineItem[$objectId] += $amount;
The @
(error control operator) will cause PHP to ignore the error caused by the non-existent index, create the element (with an empty value) and then add $amount
to it, resulting in a value of $amount
(as the empty value gets converted to 0 as a number).
Warning use of the
@
operator could potentially make it harder to debug
your code, as it will hide error messages that you may have
needed to see (for example, even if$this
doesn't exist, or there is
no object element called_costRemovedByLineItem
, PHP will create
them along with the array). See the third case in my example code.
Alternatively in PHP7 you can use the Null Coalescing Operator
:
$this->_costRemovedByLineItem[$objectId] = ($this->_costRemovedByLineItem[$objectId] ?? 0) + $amount;
And in PHP < 7 you can use the ternary operator
$this->_costRemovedByLineItem[$objectId] = (isset($this->_costRemovedByLineItem[$objectId]) ? $this->_costRemovedByLineItem[$objectId] : 0) + $amount;
A shorter example of each:
$amount = 4;
@$a[5] += $amount;
print_r($a);
$b[6] = ($b[6] ?? 0) + $amount;
print_r($b);
@$c->x[5] += $amount;
print_r($c);
$d[3] = (isset($d[3]) ? $d[3] : 0) + $amount;
print_r($d);
Output:
Array ( [5] => 4 )
Array ( [6] => 4 )
stdClass Object (
[x] => Array ( [5] => 4 )
)
Array ( [3] => 4 )
Demo on 3v4l.org
Something that will work in all versions of PHP:
@$this->_costRemovedByLineItem[$objectId] += $amount;
The @
(error control operator) will cause PHP to ignore the error caused by the non-existent index, create the element (with an empty value) and then add $amount
to it, resulting in a value of $amount
(as the empty value gets converted to 0 as a number).
Warning use of the
@
operator could potentially make it harder to debug
your code, as it will hide error messages that you may have
needed to see (for example, even if$this
doesn't exist, or there is
no object element called_costRemovedByLineItem
, PHP will create
them along with the array). See the third case in my example code.
Alternatively in PHP7 you can use the Null Coalescing Operator
:
$this->_costRemovedByLineItem[$objectId] = ($this->_costRemovedByLineItem[$objectId] ?? 0) + $amount;
And in PHP < 7 you can use the ternary operator
$this->_costRemovedByLineItem[$objectId] = (isset($this->_costRemovedByLineItem[$objectId]) ? $this->_costRemovedByLineItem[$objectId] : 0) + $amount;
A shorter example of each:
$amount = 4;
@$a[5] += $amount;
print_r($a);
$b[6] = ($b[6] ?? 0) + $amount;
print_r($b);
@$c->x[5] += $amount;
print_r($c);
$d[3] = (isset($d[3]) ? $d[3] : 0) + $amount;
print_r($d);
Output:
Array ( [5] => 4 )
Array ( [6] => 4 )
stdClass Object (
[x] => Array ( [5] => 4 )
)
Array ( [3] => 4 )
Demo on 3v4l.org
edited 36 mins ago
answered 3 hours ago
NickNick
27.3k111941
27.3k111941
Now that is nice
– Siavas
3 hours ago
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX
– Devon
3 hours ago
@Devon the failure in your demo occurs when_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.
– Nick
3 hours ago
add a comment |
Now that is nice
– Siavas
3 hours ago
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX
– Devon
3 hours ago
@Devon the failure in your demo occurs when_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.
– Nick
3 hours ago
Now that is nice
– Siavas
3 hours ago
Now that is nice
– Siavas
3 hours ago
1
1
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using
@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX– Devon
3 hours ago
The null coalescing example is great imho, but the first example can be really problematic when debugging. I'd never recommend using
@
. What if _costRemovedByLineItem is deleted, or is an object. The code will fail without any error in anything under 7.1: 3v4l.org/pvvrX– Devon
3 hours ago
@Devon the failure in your demo occurs when
_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.– Nick
3 hours ago
@Devon the failure in your demo occurs when
_costRemovedByLineItem
is an object, but if it is OPs code will also fail as they are trying to use it as an array too.– Nick
3 hours ago
add a comment |
Ternary operators!
$this->_costRemovedByLineItem[$objectId] =
(isset($this->_costRemovedByLineItem[$objectId])) ?
$this->_costRemovedByLineItem[$objectId] + $amount :
$amount;
One sec... is this actually simpler?
But maybe...
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?? 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
This is for PHP 7+ only though. Or if you don't mind E_NOTICEs, from PHP 5.3:
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?: 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
One sec... this we just make the code harder to understand with not much improved?
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
add a comment |
Ternary operators!
$this->_costRemovedByLineItem[$objectId] =
(isset($this->_costRemovedByLineItem[$objectId])) ?
$this->_costRemovedByLineItem[$objectId] + $amount :
$amount;
One sec... is this actually simpler?
But maybe...
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?? 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
This is for PHP 7+ only though. Or if you don't mind E_NOTICEs, from PHP 5.3:
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?: 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
One sec... this we just make the code harder to understand with not much improved?
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
add a comment |
Ternary operators!
$this->_costRemovedByLineItem[$objectId] =
(isset($this->_costRemovedByLineItem[$objectId])) ?
$this->_costRemovedByLineItem[$objectId] + $amount :
$amount;
One sec... is this actually simpler?
But maybe...
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?? 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
This is for PHP 7+ only though. Or if you don't mind E_NOTICEs, from PHP 5.3:
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?: 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
One sec... this we just make the code harder to understand with not much improved?
Ternary operators!
$this->_costRemovedByLineItem[$objectId] =
(isset($this->_costRemovedByLineItem[$objectId])) ?
$this->_costRemovedByLineItem[$objectId] + $amount :
$amount;
One sec... is this actually simpler?
But maybe...
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?? 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
This is for PHP 7+ only though. Or if you don't mind E_NOTICEs, from PHP 5.3:
$this->_costRemovedByLineItem[$objectId] = $this->_costRemovedByLineItem[$objectId] ?: 0;
$this->_costRemovedByLineItem[$objectId] += $amount;
One sec... this we just make the code harder to understand with not much improved?
answered 4 hours ago
SiavasSiavas
1,7161922
1,7161922
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
add a comment |
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yeah, I agree all the solutions are a little shorter, but I am not sure they improve readability much.
– lukemh
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
Yep, this is what I was trying to say :)
– Siavas
3 hours ago
add a comment |
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What version of PHP?
– Nick
4 hours ago
Instead of trying to "simplify", go for code readability, you'll thank yourself later. Imho also go ahead and add a check for if is that property an array or not and add a handling for that scenario, cause php ain't letting you set an index for a boolean, now is it. 1 more vector of error squashed.
– Mohd Abdul Mujib
2 hours ago