Cannot Assign to Property: 'Xxxx' Is a Get-Only Property

Cannot assign to property: 'xxxx' is a get-only property

The error occurs because you did not tell the compiler what to do if the value of currentBook is mutated. The compiler assumes it is immutable.

Just add a setter so that the compiler knows what to do when you set the value:

var currentBook: Book {
    get { return books[books.count - 1] }
    set { books[books.count - 1] = newValue }
}

Or, consider using books.last!:

books.last!.position = CGPoint.zero

Cannot assign to property: 'b0' is a get-only property

Here's my first attempt at a fix. The extension currently only has a getter, so we'll edit that extension to replace the lines to something like this:

var b0 : Bool {
    get {return ((self & 0x1) == 0) ? false : true}
    set {self = newValue ? self & 0x1 : self ^ 0x1}
}

var b1 : Bool {
    get {return ((self & 0x2) == 0) ? false : true}
    set {self = newValue ? self | 0x2 : self ^ 0x2}
}

Hopefully I got the bitset stuff right (it's not my strong suit).

Cannot assign to property: 'order' is a get-only property

In MyBookmarkViewModel order is a computed read-only property.

If you want to set it you need a set {} branch

var order: Int64 {
    get { myBM.order } 
    set { myBM.order = newValue }
}

Swift error saying it cannot assign to property due to it being a 'let' constant

You are accessing the local variable captureDevice, not the struct's captureDevice variable.

Just replace the line causing the error to the following:

self.captureDevice?.exposureMode = .continuousAutoExposure

Note the self. before captureDevice.

You might think of changing the conditional binding to using var instead of let, but that won't actually work. This is because you are just mutating a local copy. It will fix the compile error but the logic won't work.

Cannot assign to read only property 'stopImmediatePropagation' of object

After a global update of all my packages, everything started working again. The same for other users, check GitHub issue

My package.json:

"dependencies": {
"@angular/animations": "^6.0.7",
"@angular/common": "^6.0.7",
"@angular/compiler": "^6.0.7",
"@angular/core": "^6.0.7",
"@angular/forms": "^6.0.7",
"@angular/http": "^6.0.7",
"@angular/platform-browser": "^6.0.7",
"@angular/platform-browser-dynamic": "^6.0.7",
"@angular/platform-server": "^6.0.7",
"@angular/router": "^6.0.7",
"@ng-bootstrap/ng-bootstrap": "^2.2.0",
"aspnet-prerendering": "^3.0.1",
"aspnet-webpack": "^3.0.0",
"bootstrap": "^4.1.1",
"css": "2.2.3",
"es6-shim": "0.35.3",
"event-source-polyfill": "0.0.12",
"jquery": "3.3.1",
"jwt-decode": "^2.2.0",
"material-design-icons": "^3.0.1",
"moment": "^2.22.2",
"ngx-toastr": "^8.8.0",
"nodemailer": "^4.6.7",
"popper.js": "^1.14.3",
"preboot": "6.0.0-beta.4",
"reflect-metadata": "0.1.12",
"rxjs": "^6.2.1",
"stacktrace-js": "^2.0.0",
"zone.js": "^0.8.26"
},
"devDependencies": {
"@angular/cli": "^6.0.8",
"@angular/compiler-cli": "^6.0.7",
"@angular/language-service": "^6.0.7",
"@ngtools/webpack": "^6.0.8",
"@types/chai": "4.1.4",
"@types/jasmine": "2.8.8",
"@types/jasminewd2": "~2.0.3",
"@types/node": "^10.5.1",
"@types/stacktrace-js": "0.0.32",
"@types/webpack-env": "^1.13.6",
"angular-router-loader": "^0.8.5",
"angular2-template-loader": "^0.6.2",
"chai": "4.1.2",
"codelyzer": "^4.4.2",
"css-loader": "^0.28.11",
"file-loader": "^1.1.11",
"html-loader": "^0.5.5",
"jasmine": "^3.1.0",
"jasmine-core": "3.1.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "2.0.4",
"karma-chai": "0.1.0",
"karma-chrome-launcher": "2.2.0",
"karma-cli": "1.0.1",
"karma-coverage-istanbul-reporter": "^2.0.1",
"karma-jasmine": "1.1.2",
"karma-jasmine-html-reporter": "^1.2.0",
"karma-webpack": "^3.0.0",
"mini-css-extract-plugin": "^0.4.1",
"ng-router-loader": "^2.1.0",
"protractor": "~5.3.2",
"style-loader": "^0.21.0",
"to-string-loader": "^1.1.5",
"ts-loader": "^4.4.2",
"ts-node": "~7.0.0",
"tslint": "^5.10.0",
"typescript": "^2.7.2",
"uglifyjs-webpack-plugin": "^1.2.7",
"url-loader": "^1.0.1",
"webpack": "^4.14.0",
"webpack-bundle-analyzer": "^2.13.1",
"webpack-cli": "^3.0.8",
"webpack-dev-middleware": "^3.1.3",
"webpack-hot-middleware": "^2.22.2",
"webpack-merge": "^4.1.3"
}

Can not assign new property in react , got ` Can't add property xxx, object is not extensible`

try:

React.cloneElement(this.props.trigger, {
        onClick: this.toggleDialog
});

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