Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>First, your current code does not work correctly when <code>needle</code> is a regex which does not match. i.e. The following line:</p> <pre class="lang-js prettyprint-override"><code>return this.match(needle).length; </code></pre> <p>The <code>match</code> method returns <code>null</code> when there is no match. A JavaScript error is then generated when the <code>length</code> property of <code>null</code> is (unsuccessfully) accessed. This is easily fixed like so:</p> <pre class="lang-js prettyprint-override"><code>var m = this.match(needle); return m ? m.length : 0; </code></pre> <p>Now to the problem at hand. You are correct when you say that <code>global</code>, <code>ignoreCase</code> and <code>multiline</code> are read only properties. The only option is to create a new RegExp. This is easily done since the regex source string is stored in the <code>re.source</code> property. Here is a tested modified version of your function which corrects the problem above and creates a new RegExp object when <code>needle</code> does not already have its <code>global</code> flag set:</p> <pre class="lang-js prettyprint-override"><code>String.prototype.numberOf = function(needle) { var num = 0, lastIndex = 0; if (typeof needle === "string" || needle instanceof String) { while((lastIndex = this.indexOf(needle, lastIndex) + 1) &gt; 0) {num++;} return num; } else if(needle instanceof RegExp) { if (!needle.global) { // If global flag not set, create new one. var flags = "g"; if (needle.ignoreCase) flags += "i"; if (needle.multiline) flags += "m"; needle = RegExp(needle.source, flags); } var m = this.match(needle); return m ? m.length : 0; } return 0; }; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POChanging the RegExp flags
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USridgerunner
    1. USridgerunner
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POChanging the RegExp flags
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThanks for pointing out the inconsistency. I like the solution, it is maybe safer not to extend the RegExp prototype with a flags function (as suggested above).
      singulars
      1. PO
      1. USWitiko
    2. COBetter yet, use `myRegex.test(str)` if that's all you care about. It's both shorter and faster.
      singulars
      1. PO
      1. USPhrogz
    3. CONot quite, I'm trying to count all the occurances. :-)
      singulars
      1. PO
      1. USWitiko
 

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