70 lines
1.7 KiB
Markdown
70 lines
1.7 KiB
Markdown
Here is a list of all functions you can use in SilverBullet’s [[Expression Language]]:
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# Lists
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## count(list)
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Count the number of elements in a list:
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```template
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There are **{{count({page})}}** pages in this space.
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```
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## at(list, index)
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Returns the `index`th element of `list` (starting from 0 of course).
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```template
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Index 1 of our count to three is {{at([1, 2, 3], 1)}}
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```
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# Templates
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## template(text, value)
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Renders a template with an optional value:
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```template
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{{template([[Library/Core/Query/Page]], {"name": "Some page"})}}
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```
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# Date and time
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## today()
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Today’s date in a `YYYY-MM-dd` format.
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## tomorrow()
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Tomorrow’s date in a `YYYY-MM-dd` format.
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## yesterday()
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Yesterday’s date in `YYYY-MM-dd` format.
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## niceDate(timestamp)
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Convert a unix timestamp to a `YYYY-MM-dd` format.
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## time()
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Current time.
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# String manipulation
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## replace(str, match, replacement)
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Replace text in a string. `match` can either be a literal string or a regular expression: `replace("hello", "ell", "all")` would produce “hallo”, and `replace("hello", /l/, "b")` would produce “hebbo”.
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This function supports an infinite number of replacements, so you can keep adding more, e.g. `replace(str, match1, replacement1, match2, replacement2, match3, replacement3)`
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## contains(str, substr)
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Returns whether `str` contains `substr` as a substring.
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## json(obj)
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Convert the argument to a JSON string (for debugging purposes).
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```template
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The current page object: {{json(@page)}}
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```
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# Space related
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## pageExists(name)
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Checks if the page `name` exists:
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```template
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This very page exists: {{pageExists(@page.name)}}
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And this one: {{pageExists("non-existing")}}
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```
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## readPage(name)
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Reads in the content of the page `name` and returns it as a string. |