string-convert-indexes v6.0.18
Install
This package is pure ESM. If you're not ready yet, install an older version of this program, 4.1.0 (npm i string-convert-indexes@4.1.0
).
npm i string-convert-indexes
Quick Take
import { strict as assert } from "assert";
import { nativeToUnicode, unicodeToNative } from "string-convert-indexes";
// CONVERTING NATIVE JS INDEXES TO UNICODE-CHAR-COUNT-BASED
// 𝌆 - \uD834\uDF06
// at index 1, we have low surrogate, that's still grapheme index zero
assert.equal(nativeToUnicode("\uD834\uDF06aa", "1"), "0");
// notice it's retained as string. The same type as input is retained!
// at index 2, we have first letter a - that's second index, counting graphemes
assert.equal(nativeToUnicode("\uD834\uDF06aa", 3), 2);
// convert many indexes at once - any nested data structure is fine:
assert.deepEqual(nativeToUnicode("\uD834\uDF06aa", [1, 0, 2, 3]), [0, 0, 1, 2]);
// numbers from an AST-like complex structure are still picked out and converted:
assert.deepEqual(nativeToUnicode("\uD834\uDF06aa", [1, "0", [[[2]]], 3]), [
0, // notice matching type is retained
"0", // notice matching type is retained
[[[1]]],
2,
]);
// CONVERTING UNICODE-CHAR-COUNT-BASED TO NATIVE JS INDEXES
// 𝌆 - \uD834\uDF06
assert.deepEqual(unicodeToNative("\uD834\uDF06aa", [0, 1, 2]), [0, 2, 3]);
assert.deepEqual(unicodeToNative("\uD834\uDF06aa", [1, 0, 2]), [2, 0, 3]);
assert.throws(() => unicodeToNative("\uD834\uDF06aa", [1, 0, 2, 3]));
// throws an error!
// that's because there's no character (counting Unicode characters) with index 3
// we have only three Unicode characters, so indexes go only up until 2
Documentation
Please visit codsen.com for a full description of the API.
Contributing
To report bugs or request features or assistance, raise an issue on GitHub.
Licence
MIT License.
Copyright © 2010-2024 Roy Revelt and other contributors.
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