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change get_nth_derivative_str

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This commit is contained in:
Simon Gardling 2022-05-17 08:46:58 -04:00
parent 86f73a4af8
commit f775f64357
1 changed files with 7 additions and 1 deletions
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8
parsing/src/parsing.rs
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@ -138,7 +138,13 @@ impl BackingFunction {
pub fn get_derivative_2(&self, x: f64) -> f64 { self.derivative_2.eval(&[x]) }
/// Get string relating to the nth derivative
pub fn get_nth_derivative_str(&self) -> &str { &self.nth_derivative.as_ref().unwrap().2 }
pub fn get_nth_derivative_str(&self) -> &str {
&self
.nth_derivative
.as_ref()
.map(|a| a.2.as_str())
.unwrap_or("")
}
pub fn get_nth_derivative(&mut self, n: usize, x: f64) -> f64 {
match n {