Questions tagged [operators]
Operators are symbols that occur in nearly all programming and coding languages, used for performing calculations, comparisons, and assignments of data. Use this tag for any questions relating to operators, in any language, including things such as syntax, behaviour and use.
operators
7,829
questions
1
vote
2
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135
views
Freemarker equivalent of typescript optional chaining "?"
Typescript has a nice operator ? (called optional chaining) that check empty attributes in chains of dots.
Example
x?.y?.w?.z
means (more or less)
if (x !== undefined && x !== null &&
...
- 982
-2
votes
2
answers
134
views
Make easely a sub array from an array
Check this c/c++ code, but just pay atention to the use of "&" operator and the array operations into the function. Its ok to pass an array like that?, will be any invalid access problem ...
- 25
0
votes
1
answer
56
views
Using assignment operators in Dart
void main()
{
var a=10;
var b=2;
var toplam=a+=b;
var fark=a-=b;
var carpim=a*=b;
var bolme=a/=b;
print("$toplam");
print("$fark");
print("$carpim");
...
1
vote
0
answers
45
views
Operator Associativity Test vs Operand Evaluation Order
I am trying to write a simple code structure that verifies whether the && operator in a language (not a specific language, so I can't get help of truthy/falsy values) is left-associative or ...
- 53
1
vote
1
answer
56
views
Dictionary subscript or operator which adds a specified "default" value if key doesn't exist is Swift?
I need to write something like the following:
var dict = [SomeEnum: SomeObject]()
var someValue: SomeObject! = dict[.case1]
if someValue == nil {
someValue = someDefaultValue
dict[.case1] = ...
- 1,339
0
votes
1
answer
42
views
Reading the values out of an expression string, while keeping the formula intact
I have some code with mathematical operations, and I'm trying to make them easier to read and debug. But a very particular case is becoming complex, here's an example:
public int val1=1;
public int ...
- 643
0
votes
1
answer
89
views
How to create an "=" operator to check if a Structure type is null
I have never had any issues creating an operator before, but this time I am stumped. My goal is to be able to use the = operator to check if my structure type is null. Example: If myStruct = Nothing ...
- 57
1
vote
1
answer
23
views
Why am I unable to start a connection using my operator's port in RapidMiner?
I'm unable to move or open the operators in my process view in RapidMiner. It has this numbers on top which does not happen normally. Can someone please tell me what to do?
I have attached an image ...
- 11
0
votes
1
answer
72
views
How does the tide-operator start a pd cluster?
I've recently been learning about Kubernetes operators. When deploying an etcd cluster, the etcd-operator uses the following creation method:
Bootstrap phase: Start a seed member. In the ...
- 390
0
votes
1
answer
331
views
I do not understand how {int a=10; a+=++a-5/3+6*a; System.out.print(a);} outputs 86
I do not understand how
{
int a = 10;
a += ++a-5/3+6*a;
System.out.print(a);
}
outputs 86
I know that shorthand notation has lower precedence than any of the operator used here so my ...
- 11
0
votes
2
answers
27
views
I want to know which determines the output like not in this case applies to first condition only or both
x=(not (5==5) and (10<12))
print(x)
when executing. not negates the first expression or both?
In my opinion "not" should be executed with (5==5) only but my colleague says it will affect ...
- 1
0
votes
0
answers
40
views
SQL without using union or union all
I am trying to write a sql query to get table name and counts of multiple tables under same result columns.
Final Table:
table_name table_count
tbl1 10
tbl2 20
tbl3 40.....
0
votes
2
answers
81
views
When is the dereferencing operator useful? [duplicate]
I am a newbie c-coder, so this probably has a very simple answer. I understand the function of pointers and the dereferencing operator, but I'm not sure when they're actually useful?
Basic example:
...
- 3
2
votes
1
answer
458
views
Task Mapping over a task group without using decorator
I have implemented a task group that is expected to be reused across multiple DAGs, in one of which utilizing it in a mapping manner makes more sense. Here is the full code of my task group:
from ...
- 1,581
-1
votes
1
answer
79
views
perform calculation based on the operator passed as method parameter [closed]
I'm trying to do arithmetic operations based on the operators passed as method parameter. I can perform this in many ways but problem is I've a datatable to be operated upon. I cannot pass particular ...
- 958