You are looking for `slice()` (also [see MDC][1])

    id.slice(0, -2)


  [1]: http://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/slice

    var str = &quot;031p2&quot;;
    str.substring(0, str.length-2);

See : http://jsfiddle.net/GcxFF/

Something like:

    id.substr(0, id.length - 2)

The first parameter of *substr* is the starting index. The second parameter is how many characters to take.

When rebuilding an index, there is an option for `ONLINE=OFF` and `ONLINE=ON`. I know that when `ONLINE` mode is on, it makes a copy of the index, switches new queries to utilizing it, and then rebuilds the original index, tracking changes using versioning to both (correct me if I am wrong).

But what does SQL do in OFFLINE mode?

What is the difference between OFFLINE and ONLINE index rebuild in SQL Server?

I am running a script on a remote server. I ran the script in `screen`, however I need to stop it before it completes since I need to update the script. I can easily detach from `screen`, however, is there a way to kill a `screen` process?

How to stop a screen process in linux?

    id = &#39;01d0&#39;;
    document.write(&#39;&lt;br/&gt;&#39;+id.substr(0,-2));

How can I take a string like &#39;01d0` and get the `01` (all except the last two chars)? 

In PHP I would use `substr(0,-2)` but this doesn&#39;t seem to work in JavaScript. 

How can I make this work?

How to return all except last 2 characters of a string?

<pre><code class="hljs language-ini">id = '01d0';
document.write('&#x3C;br/>'+id.substr(0,-2));
</code></pre>
How can I take a string like '01d0<code>and get the</code>01` (all except the last two chars)?
In PHP I would use <code>substr(0,-2)</code> but this doesn't seem to work in JavaScript.
How can I make this work?

I need to show a div when you house over its parent (default is for the child div to be hidden). Is the only way to do this with javascript? 
Thanks 

Show child div on mouse hover of parent - needs javascript?

When I `console.log()` an object in my JavaScript program, I just see the output `[object Object]`, which is not very helpful in figuring out what object (or even what type of object) it is.

In C# I&#39;m used to overriding `ToString()` to be able to customize the debugger representation of an object. Is there anything similar I can do in JavaScript?

Is it possible to override JavaScript&#39;s toString() function to provide meaningful output for debugging?

Philosophical question: 

Say I&#39;ve got a web app that *requires* javascript and a modern browser, so progressive enhancement is not an issue. If my form is being built via javascript, and my data updates are all being done via ajax POSTs &amp; PUTs, is there really any reason to wrap my controls in a form tag? If I&#39;m still going to use the tag, say for semantic or structural reasons, is there any reason to have action and method params that I&#39;m going to ignore? It kind of feels like a hold-over from an earlier era to me.

Why use a form tag when you&#39;re submitting via ajax?

I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss)

I found some useful answers here but they all talk about converting to x hours and x minutes format.

So is there a tiny snippet that does this in jQuery or just raw JavaScript?


JavaScript seconds to time string with format hh:mm:ss

I am designing a one page browser based web application. 

`JQuery` is already being used in my application. I am currently planning to use `KnockoutJS` for data-binding and UI management. However I have used `Backbone.js` in past, and I have been quite impressed with the routing facilities provided by the controller layer. 

I have also looked into some JQuery-based solution like [pathjs](https://github.com/mtrpcic/pathjs) for client side routing.

It would be great if someone could offer suggestions and guidelines for choosing a proper routing system.
 
I am not willing to use `Backbone.js` instead of `KnockoutJS` because of the excellent data-binding facilities of `KnockoutJS`.


Preferred client side routing solution?

I have a variable which has a string stored in it and need to check if it has lines in it:

    var=`ls &quot;$sdir&quot; | grep &quot;$input&quot;`

pseudo-code:

    while [ ! $var&#39;s number of lines -eq 1 ]
      do something


That&#39;s my idea on how to check it. `echo $var | wc -l` doesn&#39;t work - it always says `1`, even though it has `3`.

`echo -e` doesn&#39;t work as well.

In bash, how do I count the number of lines in a variable?

I would like to convert the string containing `abc` to a list of characters and a hashset of characters. How can I do that in Java ? 

    List&lt;Character&gt; charList = new ArrayList&lt;Character&gt;(&quot;abc&quot;.toCharArray());
    	



Java collections convert a string to a list of characters

Why I cannot `cout` `string` like this:

    string text ;
    text = WordList[i].substr(0,20) ;
    cout &lt;&lt; &quot;String is  : &quot; &lt;&lt; text &lt;&lt; endl ;

When I do this, I get the following error:

&gt; Error	2	error C2679: binary &#39;&lt;&lt;&#39; : no operator found which takes a right-hand operand of type &#39;std::string&#39; (or there is no acceptable conversion)	c:\users\mollasadra\documents\visual studio 2008\projects\barnamec\barnamec\barnamec.cpp	67	barnamec**

It is amazing, that even this is not working:

    string text ;
    text = &quot;hello&quot;  ;
    cout &lt;&lt; &quot;String is  : &quot; &lt;&lt; text &lt;&lt; endl ;

Why I cannot cout a string?

How could i convert data from string to long in C#?

I have data 

    String strValue[i] =&quot;1100.25&quot;;

now i want it in

    long l1;

How could I convert data from string to long in c#

I have:

    uint8 buf[] = {0, 1, 10, 11};

I want to convert the byte array to a string such that I can print the string using printf:

    printf(&quot;%s\n&quot;, str);

and get (the colons aren&#39;t necessary):

    &quot;00:01:0A:0B&quot;


Any help would be greatly appreciated.

How do you convert a byte array to a hexadecimal string in C?

Given that strings are immutable in .NET, I&#39;m wondering why they have been designed such that `string.Substring()` takes O(`substring.Length`) time, instead of `O(1)`?

i.e. what were the tradeoffs, if any?

If strings are immutable in .NET, then why does Substring take O(n) time?

In a batch file, I have a string `abcdefg`.  I want to check if `bcd` is in the string.  

Unfortunately it seems all of the solutions I&#39;m finding search a *file* for a substring, not a string for a substring.

Is there an easy solution for this?

Batch file: Find if substring is in string (not in a file)

How to ignore the first 10 characters of a string?

Input:

    str = &quot;hello world!&quot;;

Output:

    d!





How to remove first 10 characters from a string?

I want to get `QString` from another `QString`, when I know necessary indexes.
For example:
Main string: *&quot;This is a string&quot;*.
I want to create new `QString` from first 5 symbols and get *&quot;This &quot;*.   
**input :** first and last char number.  
**output :** new `QString`.

How to create it ?  

**P.S.** Not only first several letters, also from the middle of the line, for example from 5 till 8.

Qt. get part of QString

How can I get the last n characters from a string in R?
Is there a function like SQL&#39;s RIGHT?

Extracting the last n characters from a string in R

As I only now noticed after commenting on [this answer](https://stackoverflow.com/questions/6900955/python-convert-list-to-dictionary/6900977#6900977), slices in Python 3 return shallow copies of whatever they&#39;re slicing rather than views. Why is this still the case? Even leaving aside numpy&#39;s usage of views rather than copies for slicing, the fact that `dict.keys`, `dict.values`, and `dict.items` all return views in Python 3, and that there are many other aspects of Python 3 geared towards greater use of iterators, makes it seem that there would have been a movement towards slices becoming similar. `itertools` does have an `islice` function that makes iterative slices, but that&#39;s more limited than normal slicing and does not provide view functionality along the lines of `dict.keys` or `dict.values`.

As well, the fact that you can use assignment to slices to modify the original list, but slices are themselves copies and not views, is a contradictory aspect of the language and seems like it violates several of the principles illustrated in [the Zen of Python](http://www.python.org/dev/peps/pep-0020/).

That is, the fact you can do

    &gt;&gt;&gt; a = [1, 2, 3, 4, 5]
    &gt;&gt;&gt; a[::2] = [0, 0, 0]
    &gt;&gt;&gt; a
    [0, 2, 0, 4, 0]

But not

    &gt;&gt;&gt; a = [1, 2, 3, 4, 5]
    &gt;&gt;&gt; a[::2][0] = 0
    &gt;&gt;&gt; a
    [0, 2, 3, 4, 5]

or something like

    &gt;&gt;&gt; a = [1, 2, 3, 4, 5]
    &gt;&gt;&gt; b = a[::2]
    &gt;&gt;&gt; b
    view(a[::2] -&gt; [1, 3, 5])   # numpy doesn&#39;t explicitly state that its slices are views, but it would probably be a good idea to do it in some way for regular Python
    &gt;&gt;&gt; b[0] = 0
    &gt;&gt;&gt; b
    view(a[::2] -&gt; [0, 3, 5])
    &gt;&gt;&gt; a
    [0, 2, 3, 4, 5]

Seems somewhat arbitrary/undesirable.

I&#39;m aware of http://www.python.org/dev/peps/pep-3099/ and the part where it says &quot;Slices and extended slices won&#39;t go away (even if the `__getslice__` and `__setslice__` APIs may be replaced) nor will they return views for the standard object types.&quot;, but the linked discussion provides no mention of why the decision about slicing with views was made; in fact, the majority of the comments on that specific suggestion out of the suggestions listed in the original post seemed to be positive.

What prevented something like this from being implemented in Python 3.0, which was specifically designed to not be strictly backwards-compatible with Python 2.x and thus would have been the best time to implement such a change in design, and is there anything that may prevent it in future versions of Python?

Why are slices in Python 3 still copies and not views?

How would you extract items 3..6 efficiently, elegantly and pythonically from the following `deque` without altering it:

    from collections import deque
    q = deque(&#39;&#39;,maxlen=10)
    for i in range(10,20):
        q.append(i)

the [slice notation][1] doesn&#39;t seem to work with `deque`...


  [1]: https://stackoverflow.com/questions/509211/good-primer-for-python-slice-notation/509295#509295

Use slice notation with collections.deque

I&#39;m currently working my way through the excellent [Tour of Go](https://tour.golang.org/).
I finished one of the exercises (#45) with the following solution:

    func Pic(dx, dy int) [][]uint8 {
    	pic := make([][]uint8, dy) /* type declaration */
    	for i := range pic {
    		pic[i] = make([]uint8, dx) /* again the type? */
    		for j := range pic[i] {
    			pic[i][j] = uint8((i+j)/2)
    		}
    	}
    	return pic
    }

I don&#39;t understand why I have to use a `make` statement with the `uint8` type twice (see comments in snippet). That seems redundant but I can&#39;t figure out how to do it in an other way.

Slice of slices types

Is there a `foreach` construct in the Go language? 
Can I iterate over a slice or array using a `for`?

Is there a foreach loop in Go?

I have a numpy array that contains some image data. I would like to plot the &#39;profile&#39; of a transect drawn across the image. The simplest case is a profile running parallel to the edge of the image, so if the image array is `imdat`, then the profile at a selected point `(r,c)` is simply `imdat[r]` (horizontal) or `imdat[:,c]` (vertical).

Now, I want to take as input two points `(r1,c1)` and `(r2,c2)`, both lying inside `imdat`. I would like to plot the profile of the values along the line connecting these two points.

What is the best way to get values from a numpy array, along such a line? More generally, along a path/polygon?

I have used slicing and indexing before, but I can&#39;t seem to arrive at an elegant solution for such a where consecutive slice elements are not in the same row or column. Thanks for your help.

How to extract an arbitrary line of values from a numpy array?

I am trying to find a function for select e.g. first 100 chars of the string. In PHP, there exists the **substr**[ function][1]


  [1]: http://www.php.net/manual/en/function.substr.php

Does Ruby have some similar function?


Ruby - How to select some characters from string

Here is simple code 

    &lt;?php

    $var = &quot;Бензин Офиси А.С. также производит все типы жира и смазок и их побочных        продуктов в его смесительных установках нефти машинного масла в Деринце, Измите, Алиага и Измире. У Компании есть 3 885 станций технического обслуживания, включая сжиженный газ (ЛПГ) станции под фирменным знаком Петрогаз, приблизительно 5 000 дилеров, двух смазочных смесительных установок, 12 терминалов, и 26 единиц поставки аэропорта.&quot;;

    $foo = substr($var,0,142);

    echo $foo;
    ?&gt;

and it outputs something like this:

Бензин Офиси А.С. также производит все типы жира и смазок и их побочных продук�...

I tried mb_substr() with no luck. How to do this the right way?

php substr() function with utf-8 leaves � marks at the end

I am trying to extract everything before the &#39;,&#39; comma. How do I do this in JavaScript or jQuery? I tried this and not working..

    1345 albany street, Bellevue WA 42344

I just want to grab the street address.

    var streetaddress= substr(addy, 0, index(addy, &#39;.&#39;)); 



How to grab substring before a specified character jQuery or JavaScript

I am using a loop to get values from my database and my result is like:

    &#39;name&#39;, &#39;name2&#39;, &#39;name3&#39;,

And I want it like this:

    &#39;name&#39;, &#39;name2&#39;, &#39;name3&#39;

I want to remove the comma after the last value of the loop.


How do I remove the last comma from a string using PHP?

Suppose I have a list of string:

    string = c(&quot;G1:E001&quot;, &quot;G2:E002&quot;, &quot;G3:E003&quot;)

Now I hope to get a vector of string that contains only the parts after the colon &quot;:&quot;, i.e `substring = c(E001,E002,E003)`.

Is there a convenient way in R to do this? Using `substr`?

Content Type	Original Author	Original Content on Stackoverflow
Question	Logan	View Question on Stackoverflow
Solution 1 - Javascript	Tomalak	View Answer on Stackoverflow
Solution 2 - Javascript	James Allardice	View Answer on Stackoverflow
Solution 3 - Javascript	Cyril N.	View Answer on Stackoverflow
Solution 4 - Javascript	Tom Wadley	View Answer on Stackoverflow

How to return all except last 2 characters of a string?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Solution 3 - Javascript

Solution 4 - Javascript

How to stop a screen process in linux?

What is the difference between OFFLINE and ONLINE index rebuild in SQL Server?

Attributions