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What is the equivalent of isset($_POST['name']) in javascript?

Can try something like below

var post_val = <?=
json_encode($_POST) ?>;
if (typeof post_val['2'] == 'undefined') {
   document.getElementById("4").disabled = true;

Categories : Javascript

Related to : What is the equivalent of isset($_POST['name']) in javascript?
C# Dictionary equivalent in JavaScript
Yes, it's called an object. Object have keys and values just like C# dictonaries. Keys are always strings. In your case the object would look like this: { "1": { "Id": 1, "Name":" Kevin Shields" }, "2": { "Id": 2, "Name": "Natasha Romanoff" } } The default serializer produces ugly JSON. A better alternative would be Json.NET.

Categories : Javascript
PHP equivalent of JavaScript bind
Actually, $this does refer to $qux when called in that context. You can't use $this in contexts other than an object method, so if you took something like this: function test() { echo $this->baz; } It wouldn't work, no matter what you do.

Categories : Javascript
javascript equivalent to python's dictionary.get
You can check that a key exists easily in javascript by accessing it. if (output["conditionA"]) { if(output["deeply"]) { if(output["deeply"]["nested"]) { if(output["deeply"]["nested"]["array"]) { if(output["deeply"]["nested"]["array"].indexOf("conditionB") !== -1) { return; } } } } } console.error("There is an error somewhere you need to be fixin

Categories : Javascript
package.json (javascript npm) or requirements.txt (python pip) equivalent for ruby
Well, Which programming language has the best package manager? | Continuous Updating as well as the two SO questions linked in my question all point to Bundler: The best way to manage a Ruby application's gems. I guess the workflow is gem install bundler, add gems to Gemfile, then bundle install.

Categories : Ruby
Laravel How to Isset _GET
This is Laravel equivalent (see if (Input::has('submit')) { $location = Input::get('city'); } But as Lalit Sharma says, you should maybe always set $location even if you have not "submit" in GET: $location = Input::get('city', null); null is the default value so you can ommit it or use any other value: $location = Input::get('city', 'Reykjavik');

Categories : PHP
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