CODEWITHSUNDEEP
javascriptmeteor
preston
preston

Reputation: 4357

Understanding Javascript compiler and maybe Meteor JS

In my Meteor App's server folder, I have server.js and helper.js

Inside helper.js I have for example:

import swisseph from 'swisseph'
SWISSEPH = {}
SWISSEPH.SWE_HOUSES_EX = Meteor.wrapAsync(swisseph.swe_houses_ex);

In my server.js file if I pass SWISSEPH.SWE_HOUSES_EX directly inside a function

const calc_longitudes_of_upagrahas = ( SWISSEPH.SWE_HOUSES_EX, flag,latitude, longitude, array_of_juls , index, obj ) => {};

I get this error:

While processing files with ecmascript (for target os.osx.x86_64):
server/server.js:488:43: Invalid left-hand side in arrow function parameters (488:43)

But if I first set SWISSEPH.SWE_HOUSES_EX inside another variable or const then it works:

const x = SWISSEPH.SWE_HOUSES_EX  //don't know why if I use SWISSEPH.SWE_HOUSES_EX directly I get an error

const calc_longitudes_of_upagrahas = ( x, flag,latitude, longitude, array_of_juls , index, obj ) => {};

What is the reason for this? For me this is counterintuitive....

Upvotes: 0

Views: 62

Answers (1)

dr_barto
dr_barto

Reputation: 6075

Your code does not call a function, but rather defines a new one:

const foo = (x, y, z) => {}

This syntax creates a new function named foo which takes three parameters. So your second code example works because the x is interpreted as a parameter; the first one fails because SWISSEPH.SWE_HOUSES_EX is not a valid parameter name.

Upvotes: 3

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