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What's the difference between an id and a class?
What's the difference between <div class=""> and <div id=""> when it comes to CSS? Is it alright to use <div id=""> ?
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What is hashCode used for? Is it unique?
I notice there is a getHashCode() method in every controls, items, in WP7, which return a sequence of number. Can I use this hashcode to identify an item? For example I want to identify a picture or a song in the device, and check it whereabout. This could be done if the hashcode given for specifi...
How do I make an html link look like a button?
I'm using ASP.NET, some of my buttons just do redirects. I'd rather they were ordinary links, but I don't want my users to notice much difference in the appearance. I considered images wrapped by anchors, i.e. tags, but I don't want to have to fire up an image editor every time I change the text ...
What is SOA “in plain english”? [closed]
Can someone explain in plain english what is SOA all about ? I hear SOA here, SOA there but I cannot understand exacly what it is and what is used for. Was it some simple concept and later evolved into something huge or what?
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Why do pthreads’ condition variable functions require a mutex?
I’m reading up on pthread.h ; the condition variable related functions (like pthread_cond_wait(3) ) require a mutex as an argument. Why? As far as I can tell, I’m going to be creating a mutex just to use as that argument? What is that mutex supposed to do?
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How do I modify fields inside the new PostgreSQL JSON datatype?
With postgresql 9.3 I can SELECT specific fields of a JSON data type, but how do you modify them using UPDATE? I can't find any examples of this in the postgresql documentation, or anywhere online. I have tried the obvious:
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How to set time zone of a java.util.Date?
I have parsed a java.util.Date from a String but it is setting the local time zone as the time zone of the date object.
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What is Serialization?
I am getting started with Object-Oriented Programming (OOP) and would like to know: what is the meaning of serialization in OOP parlance?
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Check if multiple strings exist in another string
How can I check if any of the strings in an array exists in another string?
15 Answers
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What is the point of a “Build Server”? [closed]
I haven't worked for very large organizations and I've never worked for a company that had a "Build Server".
18 Answers
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