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Spreadsheet: Throw if lookup value doesn't exist and no default is given

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And explicitly state which value wasn't found and where in the error.
This commit is contained in:
Ali Mohammad Pur 2022-06-25 21:33:26 +04:30 • committed by Linus Groh
parent 746b8ec8de
commit 135683795b
2 changed files with 14 additions and 15 deletions
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25
Base/res/js/Spreadsheet/runtime.js
View file

@ -635,6 +635,12 @@ function internal_lookup(
reference
) {
if_missing = if_missing ?? undefined;
const missing = () => {
if (if_missing !== undefined) return if_missing;
throw new Error(`Failed to find ${req_lookup_value} in ${lookup_inputs}`);
};
mode = mode ?? "exact";
const lookup_value = req_lookup_value;
let matches = null;
@ -661,7 +667,7 @@ function internal_lookup(
++i;
});
if (found_input == null) return if_missing;
if (found_input == null) return missing();
if (lookup_outputs === undefined) {
if (reference) return found_input;
@ -691,14 +697,7 @@ function lookup(req_lookup_value, lookup_inputs, lookup_outputs, if_missing, mod
}
function reflookup(req_lookup_value, lookup_inputs, lookup_outputs, if_missing, mode) {
return internal_lookup(
req_lookup_value,
lookup_inputs,
lookup_outputs,
if_missing ?? here(),
mode,
true
);
return internal_lookup(req_lookup_value, lookup_inputs, lookup_outputs, if_missing, mode, true);
}
// Cheat the system and add documentation
@ -1223,8 +1222,8 @@ lookup.__documentation = JSON.stringify({
"Allows for finding things in a table or tabular data, by looking for matches in one range, and " +
"grabbing the corresponding output value from another range.\n" +
"if `lookup target` is not specified or is nullish, it is assumed to be the same as the `lookup source`\n." +
"if nothing matches, the value `value if no match`" +
" is returned, which is `undefined` by default.\nBy setting the `match method`, the function can be altered to return " +
"if nothing matches, either the value `value if no match` (if not `undefined`) is returned, or " +
"an error is thrown.\nBy setting the `match method`, the function can be altered to return " +
"the closest ordered value (above or below) instead of an exact match. The valid choices for `match method` are:\n" +
"- `'exact'`: The default method. Uses strict equality to match values.\n" +
"- `'nextlargest'`: Uses the greater-or-equal operator to match values.\n" +
@ -1251,8 +1250,8 @@ reflookup.__documentation = JSON.stringify({
"Allows for finding references to things in a table or tabular data, by looking for matches in one range, and " +
"grabbing the corresponding output value from another range.\n" +
"if `lookup target` is not specified or is nullish, it is assumed to be the same as the `lookup source`\n." +
"if nothing matches, the value `value if no match`" +
" is returned, which is `undefined` by default.\nBy setting the `match method`, the function can be altered to return " +
"if nothing matches, either the value `value if no match` (if not `undefined`) is returned, or " +
"an error is thrown.\nBy setting the `match method`, the function can be altered to return " +
"the closest ordered value (above or below) instead of an exact match. The valid choices for `match method` are:\n" +
"- `'exact'`: The default method. Uses strict equality to match values.\n" +
"- `'nextlargest'`: Uses the greater-or-equal operator to match values.\n" +

4
Userland/Applications/Spreadsheet/Tests/free-functions.js
View file

@ -191,7 +191,7 @@ describe("Lookup", () => {
expect(lookup).toBeDefined();
// Note: String ordering.
expect(lookup("2", R`A0:A9`, R`B0:B9`)).toEqual("B2");
expect(lookup("20", R`A0:A9`, R`B0:B9`)).toBeUndefined();
expect(() => lookup("20", R`A0:A9`, R`B0:B9`)).toThrow();
expect(lookup("80", R`A0:A9`, R`B0:B9`, undefined, "nextlargest")).toEqual("B9");
});
@ -199,7 +199,7 @@ describe("Lookup", () => {
expect(reflookup).toBeDefined();
// Note: String ordering.
expect(reflookup("2", R`A0:A9`, R`B0:B9`).name).toEqual("B2");
expect(reflookup("20", R`A0:A9`, R`B0:B9`)).toEqual(here());
expect(() => reflookup("20", R`A0:A9`, R`B0:B9`)).toThrow();
expect(reflookup("80", R`A0:A9`, R`B0:B9`, undefined, "nextlargest").name).toEqual("B9");
});
});