I am relatively new to Node.js I have ran myself into an error the code is:
async function loadingOneImage(file){
........
}
async function generateDataset() {
const {image, target} = await loadingOneImage(file)
}
generateDataset();
The structure of the code can be seen above. I have a function generateDataset() that is being called initially. Inside generateDataset() another function loadingOneImage() is being called. But once I run the program I run myself into the following error:
/home/nauyan/Desktop/EsperSolutions/TensorFlow.js/tfjs-examples/simple-object-detection/dataprep.js:85
const {image, target} = await loadingOneImage(file)
^^^^^
SyntaxError: await is only valid in async function
at Module._compile (internal/modules/cjs/loader.js:721:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
Can someone please advise me regarding this problem.
Related
I can't read JS well enough or barely at all and I need to debug this. If I copy paste code into google I get nothing. I have been doing okay with most of the projects, but then they throw this. I hope this isn't a sign I'm in over my head... This is too much money too waste. I'm poor as it is.
Google, My text books
$("#factButton").on("click", function() {
var number = Math.floor((Math.random() * booFacts.length));
$("#factText").text(booFacts[number])
})
var booFacts = ["Boo is a pomeranian, Boo's best friend is another
pomeranian named Buddy, Boo the Pomeranian was born on March 16, making
him a Pisces, Boo's favourite food is grass, Boo has released two books"
};
$("#textPink").on("click", function() {
$("#funText").css("color", pink)
})
$("#textOrange").on("click", function() {
$("#funText").css("color", "orange")
})
$("#textGreen").on("click", function() {
$("#funText").css("color: "green")
})
$("#boxGrow").on(click, function() {
$("#box").animate({height:"+=35px",
width:"+=35px"}, "fast");
})
$("#boxShrink").on(click, function() {
$("#box").animate({height:"-=35px", width:"-=35px"}, "fast");
})
C:\Program Files\nodejs\node.exe --inspect-brk=7514 logic.js
Debugger listening on ws://127.0.0.1:7514/526fd8e0-d4b7-4d23-b81d-
62b99e284ae8
For help, see: https://nodejs.org/en/docs/inspector
Debugger attached.
c:\Users\richa\Desktop\BrokenCode\logic.js:16
$("#funText").css("color: "green")
^^^^^^^^^
SyntaxError: missing ) after argument list
at Module._compile (internal/modules/cjs/loader.js:721:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
Waiting for the debugger to disconnect...
SyntaxError: missing ) after argument list
at Module._compile (internal/modules/cjs/loader.js:721:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
$("#funText").css("color: "green")
^^^^^^^^^
SyntaxError: missing ) after argument list
It shows you where is the error. It is a typo.
You have working example
$("#funText").css("color", "orange")
And broken highlighted
$("#funText").css("color: "green")
Could you find the difference?
Here is my stack trace when attempting to launch my api side of my react - web app.
I have ran into this error multiple times but never seem to be able to fix it when it comes up again!
/Users/joshua_paulsen/Desktop/Jump-In-Final/api/node_modules/pouchdb-core/lib/index.js:1285
throw new Error('Invalid Adapter: ' + opts.adapter);
^
Error: Invalid Adapter: undefined
at new PouchDB (/Users/joshua_paulsen/Desktop/Jump-In-Final/api/node_modules/pouchdb-core/lib/index.js:1285:11)
at Object.<anonymous> (/Users/joshua_paulsen/Desktop/Jump-In-Final/api/dal.js:18:12)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object.<anonymous> (/Users/joshua_paulsen/Desktop/Jump-In-Final/api/routes/workouts/index.js:8:5)
I had my db defined like this - const db = new PouchDB(
${process.env.COUCH_HOSTNAME}${process.env.COUCH_DBNAME}
)
the fix ended up being changing it to this.
var pouch = new PouchDB(${process.env.COUCH_DBNAME}, { adapter: "http" })
I was taking a Udemy course, here is my code for an exercise that I was doing.
Faker is a package downloaded from the NPM library
var faker = require("faker");
console.log("+++++++++++++++++++");
console.log("Welcome to my shop!");
console.log("+++++++++++++++++++");
var data = faker.commerce.productName();
data.forEach(function(print){
console.log(data);
});
I was expecting the code to iterate over every item in the variable "data" and print the result, however this is the result I get
+++++++++++++++++++
Welcome to my shop!
+++++++++++++++++++
/home/ubuntu/workspace/node_practice/demo_app/app.js:8
data.forEach(function(print){
^
TypeError: data.forEach is not a function
at Object.<anonymous> (/home/ubuntu/workspace/node_practice/demo_app/app.js:8:6)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:389:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:504:3
I am using Cloud9 ide, why am I getting this error?
You should read the faker documentation.
https://cdn.rawgit.com/Marak/faker.js/master/examples/browser/index.html#commerce
faker.commerce.productName() is a string. Those don't have a prototype.forEach()
If you'd like to generate a set of names you can use Array.from() with faker like so:
let products = Array
.from({length: 100})
.map(faker.commerce.productName)
You now have an Array of 100 product name
I'm just trying to test Hapi.js and, whatever I code, I got this error :
node_modules/hapi/lib/server.js:145
Items.serial(this.connections, (connectionItem, next) => {
^
SyntaxError: missing ) after argument list
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:413:25)
at Object.Module._extensions..js (module.js:448:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at Object.<anonymous> (/Users/gilles/exo1/node_modules/hapi/lib/index.js:5:16)
at Module._compile (module.js:430:26)
at Object.Module._extensions..js (module.js:448:10)
Where does come form this syntax ...() => {... to make a function ?
What I did bad to use Hapi ?
Thank you very much
The syntax is called Arrow function. You use hapi 10 or later which requires node 4+, but you have an older version of node which doesn't support arrow functions yet. The solution is to upgrade your node version to 4 or 5.
I am working through Brad Dayley's Node.js, MongoDB and Angularjs book and I'm stuck on one of his exercises (Listing 4.4). I have a simple script emitterListener.js that is as follows the script is designed to makes checks on an account.
var events = require('events');
function Account() {
this.balance = 0;
events.EventEmitter.call(this);
this.deposit = function(amount) {
this.balance += amount;
this.emit('balanceChanged');
};
this.withdraw = function(amount) {
this.balance -= amount;
this.emit('balanceChanged');
};
}
Account.prototype._proto_ = events.EventEmitter.prototype;
function displayBalance() {
console.log("Account balance: $%d", this.balance);
}
function checkOverdraw() {
if (this.balance < 0) {
console.log("Account Overdrawn!!!!!");
}
}
function checkGoal(acc, goal) {
if (acc.balance > goal) {
console.log("Goal Achieved!!!!!");
}
}
var account = new Account();
account.on("balanceChanged", displayBalance);
account.on("balanceChanged", checkOverdraw);
account.on("balanceChanged", function() {
checkGoal(this, 1000);
});
account.deposit(220);
account.deposit(320);
account.deposit(600);
account.withdraw(1200);
When I run this I get the error.
TypeError: Object #<Account> has no method 'on'
at Object.<anonymous> (/Users/506132/web/emitterListener.js:35:9)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3
From my limited understanding after researching I think this means that the "on" module is not being loaded. I found a solution that suggested something similar to adding this to line 1
var events = require('events').on;
which then results in the error.
TypeError: Cannot read property 'EventEmitter' of undefined
at Object.<anonymous> (/Users/506132/web/emitterListener.js:16:35)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3
Following the logic from the first fix I tried implementing the same fix but with EventEmitter
var events = require('events').EventEmitter;
Hooray it looks like it worked.... or not......and now I get this error
TypeError: Cannot read property 'prototype' of undefined
at Object.<anonymous> (/Users/506132/web/emitterListener.js:17:48)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3
I tried adding the below code thinking why not?
var events = require('events').prototype;
and it just brings me back to the same error from before
TypeError: Cannot read property 'EventEmitter' of undefined
at Object.<anonymous> (/Users/506132/web/emitterListener.js:16:35)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:906:3
What am I doing wrong here? How should I go about debugging this and where should I look? Thanks in advance for helping a newbie out.
Cheers.
process.EventEmitter is deprecated, use require('events') instead.
Search through all your reference files (should be in multiple files) for:
var EventEmitter = process.EventEmitter
An where ever it exists, change that line to this:
var EventEmitter = require('events')
I'll post it as an answer so this question won't get marked as unanswered.
You should change:
Account.prototype.__proto__ = events.EventEmitter.prototype;
to:
Account.prototype = Object.create(events.EventEmitter.prototype);
var EventEmitter = process.EventEmitter
is deprecated in high version of node, use var EventEmitter = require('events') instead
This compilation error because of versions conflicts of npm and node. I had the same issue in my project. I resolved after install the same compatible versions of npm and node as on another machine.
Check:
nmp -v
and
node -v.
All the confusion with the actual example is the first line of code.
var events = require('events');
After Node v6.1.0 this line of code will store EventEmmiter object inside events variable, so there is no need to access it explicitly later.
Solution is very simple, just change
events.EventEmitter.call(this);
to:
events.call(this)
And change
Account.prototype._proto_ = events.EventEmitter.prototype;
to:
Account.prototype._proto_ = events.prototype;
I had the same problem a few minutes ago, I decided to downgrade node to version 6.x, then it worked