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= semantics

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This commit is contained in:
Zef Hemel 2023-10-04 09:43:15 +02:00
parent 6dc62f8d14
commit 4904644464
2 changed files with 18 additions and 13 deletions
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10
plug-api/lib/query.ts
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@ -82,8 +82,9 @@ export function evalQueryExpression(
// Record property is an array, and value is a scalar: find the value in the array
return val1.includes(val2);
} else if (Array.isArray(val1) && Array.isArray(val2)) {
// Record property is an array, and value is an array: find the value in the array
return val1.some((v) => val2.includes(v));
// Record property is an array, and value is an array: compare the arrays
return val1.length === val2.length &&
val1.every((v) => val2.includes(v));
}
return val1 == val2;
}
@ -92,8 +93,9 @@ export function evalQueryExpression(
// Record property is an array, and value is a scalar: find the value in the array
return !val1.includes(val2);
} else if (Array.isArray(val1) && Array.isArray(val2)) {
// Record property is an array, and value is an array: find the value in the array
return !val1.some((v) => val2.includes(v));
// Record property is an array, and value is an array: compare the arrays
return !(val1.length === val2.length &&
val1.every((v) => val2.includes(v)));
}
return val1 !== val2;
}

21
website/Live Queries.md
View File

@ -83,15 +83,18 @@ Logical expressions:
* or: `name = "this" or age > 10`
Binary expressions:
- `=` equals, e.g. `name = "Pete"`
- `!=` not equals, e.g. `name != "Pete"`
- `<` less than, e.g. `age < 10`
- `<=` less than or equals, e.g. `age <= 10`
- `>` greater than, e.g. `age > 10`
- `>=` greater than or equals, e.g. `age >= 10`
- `=~` to match against a regular expression, e.g. `name =~ /^template\//`
- `!=~` to not match a regular expression, e.g. `name !=~ /^template\//`
- `in` member of a list (e.g. `prop in ["foo", "bar"]`)
* `=` equals.
* For scalar values this performance an equivalence tests (e.g. `10 = 10`)
* If the left operand is an array and the right operand is _not_, this will will check if the right operand is _included_ in the left operand’s value, e.g. `[1, 2, 3] = 2` will be true.
* If both operands are arrays, they will be compared for equivalence ignoring order, so this will be true: `[1, 2, 3] = [3, 2, 1]`
* `!=` the exact inverse of the meaning of `=`, e.g. `name != "Pete"`
* `<` less than, e.g. `age < 10`
* `<=` less than or equals, e.g. `age <= 10`
* `>` greater than, e.g. `age > 10`
* `>=` greater than or equals, e.g. `age >= 10`
* `=~` to match against a regular expression, e.g. `name =~ /^template\//`
* `!=~` to not match a regular expression, e.g. `name !=~ /^template\//`
* `in` member of a list (e.g. `prop in ["foo", "bar"]`)
* `+` addition (can also concatenate strings), e.g. `10 + 12` or `name + "!!!"`
* `-` subtraction, e.g. `10 - 12`
* `/` addition, e.g. `10 / 12`