Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>My first idea was too complex and didn't work. This one simplier and I hope will work. We just check if there's outer parentheses covering current pair, i.e. when we found <code>(...)</code> we check if there's open parenthesis before <code>'('</code> and closing one after <code>')'</code>. Also we need to remove them when <code>s="(.....)"</code>, i.e. when we found outermost parentheses which starts at 0 and close at the end.</p> <pre><code>private string RemoveDoubleParenthesis(string initialString) { char[] s = new char[initialString.Length]; char toRemove = '$'; Stack&lt;int&gt; stack = new Stack&lt;int&gt;(); for (int i = 0; i &lt; s.Length; i++) { s[i] = initialString[i]; if (s[i] == '(') stack.Push(i); else if (s[i] == ')') { int start = stack.Pop(); if ((start == 0 &amp;&amp; i == (s.Length - 1)) || (s[start-1] == '(' &amp;&amp; s[i+1] == ')')) { s[start] = s[i] = toRemove; } } } return new string((from c in s where c != toRemove select c).ToArray()); } </code></pre> <p>As you see, I assume that expression doesn't have errors (missing parantheses).</p> <p><strong>UPD</strong> Thanks, @retailcoder. And sorry for messing with answer versions :) </p> <pre><code>var results = string.Join("\n", new string[] { "((f1=2)AND(f2=3))", "((f1=2)AND((f2=3)))", "(((f1=2)AND(f2=3)))", "(f1=2 AND(f2=3))", "((f1=2 AND (f3=4)) AND(f2=3))" } .Select(s =&gt; string.Format("{0} -&gt; " + RemoveDoubleParenthesis(s), s))); MessageBox.Show(results); </code></pre> <p><img src="https://i.stack.imgur.com/TGzc1.png" alt="no problem, you&#39;re welcome!"></p>
    singulars
    1. This table or related slice is empty.
    1. PORemove duplicate parenthesis from expression
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMathieu Guindon
    1. USpkuderov
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI got that first version was wrong and changed it
      singulars
      1. PO
      1. USpkuderov
    2. COStrings are immutable, `s.Replace(toRemove.ToString(), "");` doesn't change the value of `s`... *immutable* also means the indexer for `string.this[int]` is read-only and can't be assigned like this - your code doesn't compile as is ;)
      singulars
      1. PO
      1. USMathieu Guindon
    3. COoh, yeah, forgot about that. UPD. how about that?
      singulars
      1. PO
      1. USpkuderov
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload