`int` is not a type in TypeScript. You probably want to use `number`:

    var listOfLists : number[][];

You do it exactly like in Java/C#, e.g. (in a class):

    class SomeClass {
        public someVariable: Array&lt;Array&lt;AnyTypeYouWant&gt;&gt;;
    }

Or as a standalone variable:

    var someOtherVariable: Array&lt;Array&lt;AnyTypeYouWant&gt;&gt;;

The simplest is:

    x: Array&lt;Array&lt;Any&gt;&gt;

And, if you need something more complex, you can do something like this:

    y: Array&lt;Array&lt;{z:int, w:string, r:Time}&gt;&gt;


@Eugene you can use something like ``Array&lt;Array&lt;[string, number]&gt;&gt;`` to define a Map type

You can create your own custom types to create a strongly typed array:

    type GridRow = GridCell[]   //array of cells
    const grid: GridRow[] = []; //array of rows

I&#39;m trying to execute curl using node child_process to get a JSON file (about 220Ko) from a shared folder in a local network. But it actually returns a buffer problem that I can&#39;t get throught.
Here is my code:

    var exec = require(&#39;child_process&#39;).exec;

    var execute = function(command, callback){
        exec(command, function(error, stdout, stderr){ callback(error, stdout); });
    };

    execute(&quot;curl http://&quot; + ip + &quot;/file.json&quot;, function(err, json, outerr) {
        if(err) throw err;
        console.log(json);
    })


And here is the error I get:

    if(err) throw err;
              ^
    Error: stdout maxBuffer exceeded.
        at Socket.&lt;anonymous&gt; (child_process.js:678:13)
        at Socket.EventEmitter.emit (events.js:95:17)
        at Socket.&lt;anonymous&gt; (_stream_readable.js:746:14)
        at Socket.EventEmitter.emit (events.js:92:17)
        at emitReadable_ (_stream_readable.js:408:10)
        at emitReadable (_stream_readable.js:404:5)
        at readableAddChunk (_stream_readable.js:165:9)
        at Socket.Readable.push (_stream_readable.js:127:10)
        at Pipe.onread (net.js:526:21)


Stdout buffer issue using node child_process

I found that `UICollectionView` is like an upgraded version of `UITableView` introduced in iOS6, but when should I choose `UICollectionView` instead of `UITableView`? 

There are still Apps using `UITableView`, if `UICollectionView` can do anything `UITableView` can do , why people still use `UITableView`? Is there a difference as far as performance is concerned?

Thanks!

When to use UICollectionView instead of UITableView?

In a language like C# I can declare a list of lists like:

    List&lt;List&lt;int&gt;&gt; list_of_lists;

Is there a similar way to declare a strongly typed array of arrays in TypeScript?  I tried the following approaches but neither compiles.

    var list_of_lists:int[][];
    var list_of_lists:Array&lt;int[]&gt;;




Create strongly typed array of arrays in TypeScript

In a language like C# I can declare a list of lists like:
<pre><code class="hljs language-swift">List&#x3C;List&#x3C;int>> list_of_lists;
</code></pre>
Is there a similar way to declare a strongly typed array of arrays in TypeScript? I tried the following approaches but neither compiles.
<pre><code class="hljs language-ini">var list_of_lists:int[][];
var list_of_lists:Array&#x3C;int[]>;
</code></pre>

I have a JS library called leaflet which has an existing TypeScript definition file.

I wish to use a plugin which extends some of the objects in leaflet with an extra function.

In the existing TypeScript definition file the objects are defined as classes rather than interfaces.

e.g.

    declare module L {
        function circleMarker(latlng: LatLng, options?: PathOptions): CircleMarker;
    
        export class CircleMarker extends Circle {
            constructor(latlng: LatLng, options?: PathOptions);
            setLatLng(latlng: LatLng): CircleMarker;
            setRadius(radius: number): CircleMarker;
            toGeoJSON(): any;
        }
    }

If I try and define it a second time in a separate file then I get an error about &quot;Duplicate Identifier &#39;CircleMarker&#39;.&quot;.

    declare module L {
        export class CircleMarker {
            bindLabel(name: string, options: any): CircleMarker;
        }
    }

This makes sense as it&#39;s a class and not an interface, but that being the case is there a way to extend this class definition without changing the original definition file?

The base definition file is pulled in from DefinitelyTyped via nuget so I have a very strong desire not to make any changes to it as it&#39;ll make updating much more awkward/prone to failure.

How do I extend a TypeScript class definition in a separate definition file?

Setting default value for TypeScript object passed as argument

My level of typescript is &#39;ABSOLUTE BEGINNER&#39; but I have a good OOP background. I am building an with typescript that reference an external `t.ds` library that contains the following interface:

    interface ISimpleObject {
        foo: string;
        bar?: any;
    }

Now, if I want to call a method that has an IRequestConfig parameter, how do I create one? I can see different options:

 1. Create a simple implementation of ISimpleObject. I don&#39;t like this approach because it looks like boilerplate code to me
 2. don&#39;t initialize the object (I fear this could break something...):

    `var x :IsimpleObject;
    x.bar = &#39;xxx&#39;;
    callMethod(x);`
 
 3. Cast a pojo:

    `var x :IsimpleObject = &lt;IsimpleObject&gt;{foo: &#39;yyy&#39;, bar:&#39;xxx&#39;};`
  
  I don&#39;t like this approach either because it doesn&#39;t enforce type safety...

I guess this is a fairly trivial question and I am missing something trivial about typescript.

typescript interface initialization

In Typescript, this shows an error saying isNaN accepts only numeric values

    isNaN(&#39;9BX46B6A&#39;)

and this returns false because `parseFloat(&#39;9BX46B6A&#39;)` evaluates to `9`

    isNaN(parseFloat(&#39;9BX46B6A&#39;))

I can still run with the error showing up in Visual Studio, but I would like to do it the right way.

Currently, I have written this modified function - 


    static isNaNModified = (inputStr: string) =&gt; {
        var numericRepr = parseFloat(inputStr);
        return isNaN(numericRepr) || numericRepr.toString().length != inputStr.length;
    }

In Typescript, How to check if a string is Numeric

I found the following in a TypeScript declaration file for Angular:

    interface IDirective{
        compile?:
            (templateElement: IAugmentedJQuery,

What does the `?:` after compile do? 

Content Type	Original Author	Original Content on Stackoverflow
Question	silentorb	View Question on Stackoverflow
Solution 1 - Typescript	Peter Olson	View Answer on Stackoverflow
Solution 2 - Typescript	Damian Wojakowski	View Answer on Stackoverflow
Solution 3 - Typescript	I'm	View Answer on Stackoverflow
Solution 4 - Typescript	James Harris	View Answer on Stackoverflow
Solution 5 - Typescript	LeonardoX	View Answer on Stackoverflow

Create strongly typed array of arrays in TypeScript

Typescript Problem Overview

Typescript Solutions

Solution 1 - Typescript

Solution 2 - Typescript

Solution 3 - Typescript

Solution 4 - Typescript

Solution 5 - Typescript

When to use UICollectionView instead of UITableView?

Stdout buffer issue using node child_process

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