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POjavascript equivalent of php $$ dollar dollar
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  1. POjavascript equivalent of php $$ dollar dollar
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    copied!<ol> <li>I have declared a local variable named cont in a function named validate.</li> <li>I am calling a function process from inside validate.</li> <li>I am sending the string 'cont' as argument to validate function.</li> <li>In the process function using the string 'cont' i want to access the javascript local variable's value like window['cont']. But i get undefined.</li> <li>What i am trying to do is trying to access variables like $GLOBALS in php or $$.</li> </ol> <p>Here is an example of what i did.</p> <pre><code>&lt;script&gt; function process(str) { alert(window[str]); } function validate() { var cont='once there lived a king named midas'; process('cont') } validate(); &lt;/script&gt; </code></pre> <p>The reason is i do most of the forms as ajax. i dont want to make a request string like this. </p> <pre><code>var param = "command=insert&amp;content=" + encodeURIComponent(cont); </code></pre> <p>i want to do like this.</p> <pre><code>var param = makeParam('command,[insert],content,(cont)'); </code></pre> <p>what i do in makeparam is i use regular expression to extract key value pairs. so i get the string cont from (cont) and i substitute it into window variable like window[cont]. cont will have the string 'cont'.</p> <p>so how do we get the content of a variable by using the name of the variable as string?</p> <p>so i am looking for javascript equivalent of php's $$</p> <p><strong>Edited</strong></p> <p>a part of the code where i extract cont which is inside (cont) which means i want the content of the string between ().</p> <pre><code>nxt = str[i+1].match(/\((.*)\)$/) if(nxt)param += '=' + encodeURIComponent(window[nxt[1]]); </code></pre> <p>the content of param would be </p> <pre><code>"command=insert&amp;content=once there lived a king" // assume that once there lived a king is encoded </code></pre> <hr> <p><strong>Edit. Note2.</strong></p> <p>After few more responses i am editing the code to add this.</p> <p>I am trying to do like $GLOBALS in php.</p> <p>I haven't tried whether $GLOBALS would cantain local variables too.</p> <p>and learned that local scope will not come into $GLOBALS.</p> <hr> <p><strong>Update after reading Felix King's Update.</strong></p> <p>I want to use a function which will construct a query string as simpler as possible. like the following.</p> <pre><code>var param = makeParam('command,insert,/title/,/keywords/,/description/,mode,[1],fckcontent,(cont)'); // if it is a text without // or () then the it is a straight key value pair. so i will do comment=insert. //if it is /title/ then the key is title and its value is an input elements value with id as title so title=getElementById('title') //if it is mode,[1] then mode is the key and 1 is its direct value// //if it is fckcontent,(cont) then fckcontent is the key and cont is a javascript local variable which will contain html content from a WYSIWYG editor. // a sample result will be var param = "command=insert&amp;keywords=somekeywords&amp;description=somedescription&amp;mode=1&amp;fckcontent=&lt;p&gt;once there lived a king&lt;p&gt; </code></pre> <p>and then casablanca stated that $GlOBALS will not contain local scope variables and that is the same way in javascript. that's right.</p>
 

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