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How to check a not-defined variable in JavaScript
...hing(variable)
{
var undef;
if(variable === undef)
{
alert('Hey moron, define this bad boy.');
}
}
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Unable to login to SQL Server + SQL Server Authentication + Error: 18456
...ssages of severity lower than 19 therefore do not trigger SQL Server Agent alerts.
Sung Lee, Program Manager in SQL Server Protocols (Dev.team) has outlined further information on Error state description:The common error states and their descriptions are provided in the following table:
ERROR ST...
“The file ”MyApp.app“ couldn't be opened because you don't have permission to view it” when running
... from the added library.
Then it is working fine without any permission alert.
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Opacity of div's background without affecting contained element in IE 8?
...
But be advised that rgba may not be supported by your required browsers.
Alert-free modal dialog functionality
But if you're after some kind of masking the whole page, this is usually done by adding a separate div with this set of styles:
position: fixed;
width: 100%;
height: 100%;
z-index: 1000...
Javascript what is property in hasOwnProperty?
... var somevar1= new somevar();
if(somevar1.hasOwnProperty("name"))
{
alert(somevar1.hasOwnProperty("name"));// it will return true
}
}
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How to call one shell script from another shell script?
I have two shell scripts, a.sh and b.sh .
17 Answers
17
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Best way to run scheduled tasks [closed]
... the page return results which then can be used to trigger Pingdom to send alert messages when something isn't right.
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Get position/offset of element relative to a parent container?
...de.
var position = $("#child-element").offsetRelative("div.item-parent");
alert('left: '+position.left+', top: '+position.top);
Plugin Finally, for the actual plugin (with a few notes expalaining what's going on):
// offsetRelative (or, if you prefer, positionRelative)
(function($){
$.fn.off...
Where should I put tags in HTML markup?
When embedding JavaScript in an HTML document, where is the proper place to put the <script> tags and included JavaScript? I seem to recall that you are not supposed to place these in the <head> section, but placing at the beginning of the <body> section is bad, too, since th...
MySQL ON vs USING?
In a MySQL JOIN , what is the difference between ON and USING() ? As far as I can tell, USING() is just more convenient syntax, whereas ON allows a little more flexibility when the column names are not identical. However, that difference is so minor, you'd think they'd just do away with USI...