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Is returning null bad design? [closed]

... The rationale behind not returning null is that you do not have to check for it and hence your code does not need to follow a different path based on the return value. You might want to check out the Null Object Pattern which provides more information on this. For example, i...
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How does a PreparedStatement avoid or prevent SQL injection?

I know that PreparedStatements avoid/prevent SQL Injection. How does it do that? Will the final form query that is constructed using PreparedStatements will be a string or otherwise? ...
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Delete specific line number(s) from a text file using sed?

... want to delete one or more specific line numbers from a file. How would I do this using sed? 6 Answers ...
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Facebook Open Graph not clearing cache

... It does not clear the cache whatsoever unless you use this parameter. – Umur Kontacı Sep 6 '12 at 23:41 26 ...
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Generate UML Class Diagram from Java Project [closed]

...that will show an overview of how my classes are related to each other? It doesn't need to decompile from JAR file because I have the sources. I know there are quite a few out there but most of those can only generate individual class. I hope there is a tool that can generate class diagram that show...
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last day of month calculation

...a month ahead and find out the getActualMaximum for that month how would I do so?? cheers – OakvilleWork Feb 22 '12 at 19:26 ...
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How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?

... Where do I put "\u00ed"? – Docstero May 29 '10 at 10:31 2 ...
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Javascript Drag and drop for touch devices [closed]

...vent) { var touch = event.changedTouches[0]; var simulatedEvent = document.createEvent("MouseEvent"); simulatedEvent.initMouseEvent({ touchstart: "mousedown", touchmove: "mousemove", touchend: "mouseup" }[event.type], true, true, window, 1, touch....
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Change size of axes title and labels in ggplot2

... I think a better way to do this is to change the base_size argument. It will increase the text sizes consistently. g + theme_grey(base_size = 22) As seen here. share ...
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How can I expand and collapse a using javascript?

...rdion - its nice, easy and fast. See more info here Or, if you still wanna do this by yourself, you could remove the fieldset (its not semantically right to use it for this anyway) and create a structure by yourself. Here's how you do that. Create a HTML structure like this : <div class="conta...