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Can table columns with a Foreign Key be NULL?
...d Mar 2 '10 at 21:37
Daniel VassalloDaniel Vassallo
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MySQL Error 1215: Cannot add foreign key constraint
... Thanks. This turned out to be the issue. Staff.Emp_ID was a SMALLINT, while the referencing column was an INT. Sometimes it's the little things...
– Robert B
Jun 10 '13 at 14:08
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How do I programmatically click a link with javascript?
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Actually, so far it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera.
– arik
Jan 29 '12 at 17:17
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Adding an onclick function to go to url in JavaScript?
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@FayazMd not sure what you're trying to do? Usually if it's JavaScript inside the DOM (currenty inside DOM's element a) as a web page you can not control JS behaviour on the next page (where you're redirecting the browser page). When user leaves the page it's done. Unle...
How to detect if a variable is an array
...ng() (this is guaranteed to work by ECMA-262):
Object.prototype.toString.call(obj) === '[object Array]'
Both methods will only work for actual arrays and not array-like objects like the arguments object or node lists. As all array-like objects must have a numeric length property, I'd check for th...
How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
...selection(i);
});
})(i);
}
By creating an anonymous function and calling it with the variable as the first argument, you're passing-by-value to the function and creating a closure.
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How to write a caption under an image?
...line-block;
}
figcaption {
margin: 10px 0 0 0;
font-variant: small-caps;
font-family: Arial;
font-weight: bold;
color: #bb3333;
}
figure {
padding: 5px;
}
img:hover {
transform: scale(1.1);
-ms-transform: scale(1.1);
-webkit-transform: scale(1.1);
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How do I find a “gap” in running counter with SQL?
...en this would find only 3. What I'd love it to find is 3-10 instead - basically the beginning and the end of every gap. I understand that I might have to write my own python script that leverages SQL (in my case MySql), but it would be nice if SQL could get me closer to what I want (I have a table w...
Can you define aliases for imported modules in Python?
...dule_2 as s2
– phreed
Dec 19 '19 at 16:39
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Site does not exist error for a2ensite
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You probably updated your Ubuntu installation and one of the updates included the upgrade of Apache to version 2.4.x
In Apache 2.4.x the vhost configuration files, located in the /etc/apache2/sites-available directory, must have the .conf extension.
Using term...