How to use the try function from when

bundle.js

GitHub: wishmouse/schools

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when.resolve     = Promise.resolve;      // Create a resolved promise
when.reject      = Promise.reject;       // Create a rejected promise

when.lift        = lift;                 // lift a function to return promises
when['try']      = attempt;              // call a function and return a promise
when.attempt     = attempt;              // alias for when.try

when.iterate     = Promise.iterate;      // DEPRECATED (use cujojs/most streams) Generate a stream of promises
when.unfold      = Promise.unfold;       // DEPRECATED (use cujojs/most streams) Generate a stream of promises

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