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How can I get the corresponding table header (th) from a table cell (td)?

Given the following table, how would I get the corresponding table header for each td element? 7 Answers ...
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How to make div background color transparent in CSS

I'm not using CSS3. So I can't use opacity or filter attributes. Without using these attributes how can I make the background-color transparent of a div ? It should be kind of the text box example in this link . Here the text box background color is transparent. I want to make the same, but ...
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What does `kill -0 $pid` in a shell script do?

..., what signal does '0' represent, because here I see SIGNAL numbers starting from 1. 6 Answers ...
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How to copy an object in Objective-C

...ed to deep copy a custom object that has objects of its own. I've been reading around and am a bit confused as to how to inherit NSCopying and how to use NSCopyObject. ...
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nodeValue vs innerHTML and textContent. How to choose?

I'm using plain js to alter the inner text of a label element, and I wasn't sure on what grounds I should use innerHTML or nodeValue or textContent. I don't need to create a new node or change the HTML elements or anything — just replace the text. Here's an example of the code: ...
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How to use HTML to print header and footer on every printed page of a document?

Is it possible to print HTML pages with custom headers and footers on each printed page? 17 Answers ...
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Navigation in django

I've just done my first little webapp in django and I love it. I'm about to start on converting an old production PHP site into django and as part its template, there is a navigation bar. ...
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SQLite table constraint - unique on multiple columns

I can find syntax "charts" on this on the SQLite website, but no examples and my code is crashing. I have other tables with unique constraints on a single column, but I want to add a constraint to the table on two columns. This is what I have that is causing an SQLiteException with the message "syn...
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Run a callback only if an attribute has changed in Rails

I have the following association in my app: 3 Answers 3 ...
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Clearing using jQuery

Is it possible to clear an <input type='file' /> control value with jQuery? I've tried the following: 27 Answers ...