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Add substring function
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@ -18,6 +18,7 @@ All notable changes to eww will be listed here, starting at changes since versio
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- Add `justify` property to the label widget, allowing text justification (By: n3oney)
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- Add `EWW_TIME` magic variable (By: Erenoit)
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- Add trigonometric functions (`sin`, `cos`, `tan`, `cot`) and degree/radian conversions (`degtorad`, `radtodeg`) (By: end-4)
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- Add `substring` function to simplexpr
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## [0.4.0] (04.09.2022)
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@ -379,6 +379,18 @@ fn call_expr_function(name: &str, args: Vec<DynVal>) -> Result<DynVal, EvalError
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}
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_ => Err(EvalError::WrongArgCount(name.to_string())),
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},
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"substring" => match args.as_slice() {
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[string, start, len] => {
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let result: String = string
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.as_string()?
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.chars()
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.skip(start.as_i32()?.max(0) as usize)
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.take(len.as_i32()?.max(0) as usize)
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.collect();
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Ok(DynVal::from(result))
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}
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_ => Err(EvalError::WrongArgCount(name.to_string())),
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},
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"search" => match args.as_slice() {
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[string, pattern] => {
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use serde_json::Value;
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@ -47,6 +47,7 @@ Supported currently are the following features:
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- `matches(string, regex)`: check if a given string matches a given regex (returns bool)
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- `captures(string, regex)`: Get the captures of a given regex in a string (returns array)
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- `strlength(value)`: Gets the length of the string
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- `substring(string, start, length)`: Return a substring of given length starting at the given index
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- `arraylength(value)`: Gets the length of the array
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- `objectlength(value)`: Gets the amount of entries in the object
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- `jq(value, jq_filter_string)`: run a [jq](https://stedolan.github.io/jq/manual/) style command on a json value. (Uses [jaq](https://crates.io/crates/jaq) internally).
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