There are built in methods:

    &quot;String&quot;.start_with? &quot;S&quot; # true
    &quot;String&quot;.end_with? &quot;4&quot; # false

    string.start_with?(&quot;substring&quot;)
    string.end_with?(&quot;substring&quot;)

Returns true or false

Source:

http://ruby-doc.org//core-2.2.0/String.html#method-i-start_with-3F

http://ruby-doc.org//core-2.2.0/String.html#method-i-end_with-3F


ngChange is firing while the value is changing (ngChange are not similiar to the classic onChange event). How can i bind the classic onChange event with angularjs, that will only fire when the contents are commited?

Current binding:

    &lt;input type=&quot;text&quot; ng-model=&quot;name&quot; ng-change=&quot;update()&quot; /&gt;


Angularjs: input[text] ngChange fires while the value is changing

Just playing around with queries and examples to get a better understanding of joins.  I&#39;m noticing that in SQL Server 2008, the following two queries give the same results:

    SELECT * FROM TableA
    FULL OUTER JOIN TableB
    ON TableA.name = TableB.name
    


----------


    SELECT * FROM TableA
    FULL JOIN TableB
    ON TableA.name = TableB.name

Are these performing exactly the same action to produce the same results, or would I run into different results in a more complicated example?  Is this just interchangeable terminology?

FULL OUTER JOIN vs. FULL JOIN

How should I check whether a string starts or ends with a given string? There doesn&#39;t seem to be any built-in methods available (or maybe it&#39;s just the IDE I&#39;m using that isn&#39;t having it show up: RDE)

Testing whether string starts with or end with another string

<p>How should I check whether a string starts or ends with a given string? There doesn't seem to be any built-in methods available (or maybe it's just the IDE I'm using that isn't having it show up: RDE)</p>


I do realize that I can do 

    unless [1].empty? 

But I&#39;m wondering if there is a method?

What is the opposite method of Array.empty? or [].empty? in ruby

Is there a way to detect the operating system in ruby? I am working on developing a sketchup tool that will need to detect Mac vs. Windows. 

Detecting Operating Systems in Ruby

I have an array of hashes like so:

     [{&quot;testPARAM1&quot;=&gt;&quot;testVAL1&quot;}, {&quot;testPARAM2&quot;=&gt;&quot;testVAL2&quot;}]

And I&#39;m trying to map this onto single hash like this:

    {&quot;testPARAM2&quot;=&gt;&quot;testVAL2&quot;, &quot;testPARAM1&quot;=&gt;&quot;testVAL1&quot;}

I have achieved it using

      par={}
      mitem[&quot;params&quot;].each { |h| h.each {|k,v| par[k]=v} } 

But I was wondering if it&#39;s possible to do this in a more idiomatic way (preferably without using a local variable).

How can I do this?


Rails mapping array of hashes onto single hash

What is the fastest way to check if a string matches a regular expression in Ruby?

My problem is that I have to &quot;egrep&quot; through a huge list of strings to find which are the ones that match a regexp that is given at runtime. **I only care about whether the string matches the regexp, not where it matches, nor what the content of the matching groups is.** I hope this assumption can be used to reduce the amount of time my code spend matching regexps.

I load the regexp with

    pattern = Regexp.new(ptx).freeze

I have found that `string =~ pattern` is slightly faster than `string.match(pattern)`.

Are there other tricks or shortcuts that can used to make this test even faster?

Fastest way to check if a string matches a regexp in ruby?

Please help me get all instance variables declared in a class the same way `instance_methods` shows me all methods available in a class.

    class A
      attr_accessor :ab, :ac
    end
    
    puts A.instance_methods  #gives ab and ac
    
    puts A.something         #gives me @ab @ac...

Get all instance variables declared in class

I have this function in my program that converts integers to strings:

        QString Stats_Manager::convertInt(int num)
        {
            stringstream ss;
            ss &lt;&lt; num;
            return ss.str();
        }

But when ever i run this i get the error:

    aggregate &#39;std::stringstream ss&#39; has incomplete type and cannot be defined

Im not really sure what that means. But if you know how to fix it or need any more code please just comment. Thanks.


Qt c++ aggregate &#39;std::stringstream ss&#39; has incomplete type and cannot be defined

Will the below string contain the null terminator `&#39;\0&#39;`?

    std::string temp = &quot;hello whats up&quot;;



Does std::string have a null terminator?

I have a file in Linux, I would like to diplay lines which contain a specific string in that file, how to do this?

How to find lines containing a string in linux

I would like to sort and binary search a static array of strings via the String.CompareTo comparator.

The problem is that both sorting, and binary searching requires that a Comparator object be passed in -- So how do I pass in the built in string comparator?

Java get String CompareTo as a comparator object

How might one remove the first x characters from a string? For example, if one had a string `lipsum`, how would they remove the first 3 characters and get a result of `sum`?

Content Type	Original Author	Original Content on Stackoverflow
Question	MxLDevs	View Question on Stackoverflow
Solution 1 - Ruby	Will Richardson	View Answer on Stackoverflow
Solution 2 - Ruby	sqrcompass	View Answer on Stackoverflow

Testing whether string starts with or end with another string

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

FULL OUTER JOIN vs. FULL JOIN

Angularjs: input[text] ngChange fires while the value is changing

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