That&#39;s `&quot;&quot;` :

    var s string
    fmt.Println(s==&quot;&quot;) // prints &quot;true&quot;

A string cannot be nil (but a `*string` can). 

You can simply test

    if stringId==&quot;&quot; {

To pass a zero string in `stringID`, use

    k := NewKey(c, &quot;kind&quot;, &quot;&quot;, 0, p)

From [the specification][1] :

&gt; When memory is allocated to store a value, either through a
&gt; declaration or a call of make or new, and no explicit initialization
&gt; is provided, the memory is given a default initialization. Each
&gt; element of such a value is set to the zero value for its type: false
&gt; for booleans, 0 for integers, 0.0 for floats, **&quot;&quot; for strings**, and nil
&gt; for pointers, functions, interfaces, slices, channels, and maps.


  [1]: http://golang.org/ref/spec#The_zero_value

in this case empty string, or you can use NewIncompleteKey()

The following code initializes a leaflet map. The initialize function centers the map based on user location. How do I change the center of the map to a new position after calling the initialize function?

    function initialize() {
	map = L.map(&#39;map&#39;);
	L.tileLayer(&#39;http://{s}.tile.cloudmade.com/BC9A493B41014CAABB98F0471D759707/997/256/{z}/{x}/{y}.png&#39;, {
		maxZoom: 18,
		attribution: &#39;Map data &amp;copy; &lt;a href=&quot;http://openstreetmap.org&quot;&gt;OpenStreetMap&lt;/a&gt; contributors, &lt;a href=&quot;http://creativecommons.org/licenses/by-sa/2.0/&quot;&gt;CC-BY-SA&lt;/a&gt;, Imagery &#194;&#169; &lt;a href=&quot;http://cloudmade.com&quot;&gt;CloudMade&lt;/a&gt;&#39;
	}).addTo(map);

	map.locate({setView: true, maxZoom: 8});	
    } 

How to change the map center in Leaflet.js

Is there any sample of using TypeScript with KnockoutJS? I&#39;m just curious as to how they would work together?

Edit
----

Here is what I have, seems to work

    declare var ko: any;
    declare var $: any;
    class ViewModel {
        x = ko.observable(10);
        y = ko.observable(10);
    
    }
    
    $(() =&gt; {
        ko.applyBindings(new ViewModel());
    });

This generates into the following Javascript:

    var ViewModel = (function () {
        function ViewModel() {
            this.x = ko.observable(10);
            this.y = ko.observable(10);
        }
        return ViewModel;
    })();
    $(function () {
        ko.applyBindings(new ViewModel());
    });

TypeScript with KnockoutJS

    func NewKey(c appengine.Context, kind, stringID string, intID int64, parent *Key) *Key

The documentation says :

&gt; NewKey creates a new key. kind cannot be empty. Either one or both of
&gt; stringID and intID must be **zero**. If both are zero, the key
&gt; returned is incomplete. parent must either be a complete key or nil.

What is the zero for string?

I tried `0` and `nil`, and I got errors like:


    cannot use nil as type string in function argument



What is the zero for string?

<pre><code class="hljs language-go">func NewKey(c appengine.Context, kind, stringID string, intID int64, parent *Key) *Key
</code></pre>
The documentation says :
> NewKey creates a new key. kind cannot be empty. Either one or both of
> stringID and intID must be zero. If both are zero, the key
> returned is incomplete. parent must either be a complete key or nil.
What is the zero for string?
I tried <code>0</code> and <code>nil</code>, and I got errors like:
<pre><code class="hljs language-lua">cannot use nil as type string in function argument
</code></pre>

This simple code that simply tries to replace semicolons (at i-specified postions) by colons does not work:

    for i in range(0,len(line)):
         if (line[i]==&quot;;&quot; and i in rightindexarray):
             line[i]=&quot;:&quot;

It gives the error 

    line[i]=&quot;:&quot;
    TypeError: &#39;str&#39; object does not support item assignment

How can I work around this to replace the semicolons by colons? Using replace does not work as that function takes no index- there might be some semicolons I do not want to replace.

**Example**

In the string I might have any number of semicolons, eg &quot;Hei der! ; Hello there ;!;&quot;

I know which ones I want to replace (I have their index in the string). Using replace does not work as I&#39;m not able to use an index with it.

Replacing instances of a character in a string

I have a sentence that is passed in as a string and I am doing a replace on the word &quot;and&quot; and I want to replace it with &quot; &quot;.  And it&#39;s not replacing the word &quot;and&quot; with white space.  Below is an example of my logic.  And when I debug this the logic does fall into the sentence.replace.

    String sentence = &quot;Define, Measure, Analyze, Design and Verify&quot;
    if (sentence.contains(&quot;and&quot;)){
        sentence.replace(&quot;and&quot;, &quot; &quot;);
    }

Is there something I am missing here.

String replace method is not replacing characters

If there are two keywords then they must have their own meanings. So I want to know what makes them different and what their code is.

What is the difference between a &quot;line feed&quot; and a &quot;carriage return&quot;?

I&#39;m using node + express and I am just wondering how I can import any file as a string. Lets say I have a txt file all I want is to load it into a variable as such.

    var string = require(&quot;words.txt&quot;);

I am against 

    modules.exports = function(){
    
        var string = &quot;whatever&quot;;
        
        return string;

    }

require file as string

I am using a library, [ya-csv](https://github.com/koles/ya-csv), that expects either a file or a stream as input, but I have a string.

How do I convert that string into a stream in Node?

How to create streams from string in Node.Js?

I&#39;m implementing a small TCP server. How do I know if one of my clients closed? Should I just try to read or write and check if `err` is nil?

How to know TCP connection is closed in net package?

I&#39;m curious why Go does&#39;t implicitly convert `[]T` to `[]interface{}` when it will implicitly convert `T` to `interface{}`.  Is there something non-trivial about this conversion that I&#39;m missing?  

Example:

    func foo([]interface{}) { /* do something */ }

    func main() {
        var a []string = []string{&quot;hello&quot;, &quot;world&quot;}
        foo(a)
    }

`go build` complains 

&gt; cannot use a (type []string) as type []interface {} in function argument

And if I try to do it explicitly, same thing: `b := []interface{}(a)` complains 

&gt;cannot convert a (type []string) to type []interface {}


So every time I need to do this conversion (which seems to come up a lot), I&#39;ve been doing something like this:

    b = make([]interface{}, len(a), len(a))
    for i := range a {
        b[i] = a[i]
    }


Is there a better way to do this, or standard library functions to help with these conversions?  It seems kind of silly to write 4 extra lines of code every time I want to call a function that can take a list of e.g. ints or strings.

Type converting slices of interfaces

I&#39;m trying to set a header in my Go web server. I&#39;m using `gorilla/mux` and `net/http` packages.

I&#39;d like to set `Access-Control-Allow-Origin: *` to allow cross domain AJAX.

Here&#39;s my Go code:

    func saveHandler(w http.ResponseWriter, r *http.Request) {
    // do some stuff with the request data
    }

    func main() {
    	r := mux.NewRouter()
    	r.HandleFunc(&quot;/save&quot;, saveHandler)
    	http.Handle(&quot;/&quot;, r)
    	http.ListenAndServe(&quot;:&quot;+port, nil)
    }


The `net/http` package has documentation describing sending http request headers as if it were a client - I&#39;m not exactly sure how to set response headers?

Setting HTTP headers

I was following the http://tour.golang.org/ untill I got to the third step about that tells you that you can install the gotour on your system.
After that I&#39;ve installed the go language with brew by:

    brew install hg
    brew install go
Then I downloaded the gotour by:

    go get code.google.com/p/go-tour/gotour

When I tried to launch the gotour it didnt recognise the command:

    $ gotour
    -bash: gotour: command not found
and 

    $ go gotour

and 

    $ ./gotour

So I tried to see the go path and it was empty,

    echo $GOPATH
so I defined the GOPATH:

    GOPATH=/usr/local/Cellar/go/1.0.2/src/pkg/code.google.com/p/
    export GOPATH
Now I can run the gotour by runing

    ./gotour
But I&#39;m insecure about my go enviroment.. wasn&#39;t I suposed to be able to run gotour by

    go run gotour
or just by typing (like is described on this website http://www.moncefbelyamani.com/how-to-install-the-go-tour-on-your-mac/):

    gotour

I would like to know if i&#39;m doing things the right way since I&#39;m new to the go programing language.


Install go with brew, and running the gotour

I&#39;m doing a simple http GET in Go:

    client := &amp;http.Client{}
    req, _ := http.NewRequest(&quot;GET&quot;, url, nil)
    res, _ := client.Do(req)

But I can&#39;t found a way to customize the request header in the [doc][1], thanks


  [1]: http://golang.org/pkg/net/http/

Content Type	Original Author	Original Content on Stackoverflow
Question	DeanSinaean	View Question on Stackoverflow
Solution 1 - String	Denys Séguret	View Answer on Stackoverflow
Solution 2 - String	Noypi Gilas	View Answer on Stackoverflow

What is the zero for string?

String Problem Overview

String Solutions

Solution 1 - String

Solution 2 - String

TypeScript with KnockoutJS

How to change the map center in Leaflet.js

Attributions