How export {} affects declare global

global.d.ts declare global { export interface Window { … } export {} I realized that export {} has an effect on redefining window module. I saw a brief explanation that export {} makes the d.ts file a module. However, I didn’t understand how d.ts became a module would affect the typescript. Is there any document… Read More How export {} affects declare global

Operator function defaults to first if statement in JavaScript calculator project

I’m creating a calculator with JavaScript and most functions are working properly, but the operator function defaults to the first if statement each time (I switched add with subtract to test this). i.e. if the add function is in the first if statement of my operator function, every operator button will add the numbers instead… Read More Operator function defaults to first if statement in JavaScript calculator project

Find percent difference between two columns, that share same root name, but differ in suffix

My question is somewhat similar to subtracting-two-columns-named-in-certain-pattern I’m having trouble performing operations on columns that share the same root substring, without a loop. Basically I want to calculate a percentage change using columns that end with ‘_PY’ with another column that shares the same name except for the suffix. What’s a possible one line solution,… Read More Find percent difference between two columns, that share same root name, but differ in suffix