rediscussion

This commit is contained in:
SheetJS 2022-07-30 18:17:34 -04:00
parent 89ab3cc4aa
commit 4b905a1eb9
2 changed files with 63 additions and 1 deletions

@ -167,7 +167,7 @@ a simple CFB file that can be parsed:
const { clipboard } = require('electron')
const XLSX = require("xlsx");
const buf = clipboard.readBuffer('dyn.ah62d4qmxhk4d425try1g44pdsm11g55gsu1en5pcqzwc4y5tsz3gg3k');
const cfb = XLSX.CFB.read(rtf, {type: "buffer"});
const cfb = XLSX.CFB.read(buf, {type: "buffer"});
const pkg = XLSX.CFB.find(cfb, "Package").content;
const wb = XLSX.read(pkg);
```

@ -13,6 +13,8 @@ covered in the [Database demo](./database).
:::
## Arbitrary Data to Spreadsheets
There is no natural way to translate arbitrarily shaped schemas to worksheets
in a workbook. One common trick is to dedicate one worksheet to holding named
keys. For example, considering the JS object:
@ -41,3 +43,63 @@ XXX| A | B |
3 | metadata.author | SheetJS |
4 | metadata.code | 7262 |
```
## Data Stores
### Redis
Redis has 5 core data types: "String", List", "Set", "Sorted Set", and "Hash".
Since the keys and values are limited to simple strings (and numbers), it is
possible to store complete databases in a single worksheet.
<details open><summary><b>Sample Mapping</b> (click to hide)</summary>
The first row holds the data type and the second row holds the property name.
Strings can be stored in a unified String table. The first column holds keys
and the second column holds values:
```
XXX| A | B |
---+---------+-------+
1 | Strings | |
2 | | |
3 | Hello | World |
4 | Sheet | JS |
```
Lists and Sets are unidimensional and can be stored in their own columns. The
second row holds the list name:
```
XXX| C | D |
---+---------+-------+
1 | List | Set |
2 | List1 | Set1 |
3 | List1V1 | Set1A |
4 | List1V2 | Set1B |
```
Sorted Sets have an associated score which can be stored in the second column:
```
XXX| E | F |
---+---------+---+
1 | Sorted | |
2 | ZSet1 | |
3 | Key1 | 1 |
4 | Key2 | 2 |
```
Hashes are stored like the string table, with key and value columns in order:
```
XXX| G | H |
---+-------+-------+
1 | Hash | |
2 | Hash1 | |
3 | Key1 | Val1 |
4 | Key2 | Val2 |
```
</details>