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Replace transparency in PNG images with white background

I've got some PNG images with transparency, and I need to create versions with the image layer composed onto a white background. I've tried various things with Image Magick "convert" operations, but either nothing happens at all or I get an error. I don't want to go to an intermediate JPG form bec...
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Exit a Script On Error

...$jar_file. Please recheck the variables 1>&2 exit 1 # terminate and indicate error fi ... share | improve this answer | follow | ...
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How to prevent line breaks in list items using CSS

...re space by setting li's width to greater values. [1] § 3. White Space and Wrapping: the white-space property - W3 CSS Text Module Level 3 [2] white-space - CSS: Cascading Style Sheets | MDN share | ...
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In c++ what does a tilde “~” before a function name signify?

...scription from ibm.com: Destructors are usually used to deallocate memory and do other cleanup for a class object and its class members when the object is destroyed. A destructor is called for a class object when that object passes out of scope or is explicitly deleted. See https://www.ibm.com/sup...
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Android Text over image

... That is how I did it and it worked exactly as you asked for inside a RelativeLayout: <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/relativelayout" android:layout_width="fill_parent" ...
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What is the meaning of the CascadeType.ALL for a @ManyToOne JPA association

... +1 for the best and shortest explanation of mappedBy I've ever come across. – Ridcully Sep 30 '14 at 6:19 4 ...
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MVC 4 @Scripts “does not exist”

I have just created an ASP.NET MVC 4 project and used Visual Studio 2012 RC to create a Controller and Razor Views for Index and Create Actions. ...
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Creating a JSON response using Django and Python

... One downside: it defaults to ensure_ascii and I didn't find a way to override it yet. Created a new question for this: stackoverflow.com/q/34798703/854477 – int_ua Jan 14 '16 at 20:07 ...
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Why doesn't 'ref' and 'out' support polymorphism?

... UPDATE: I used this answer as the basis for this blog entry: Why do ref and out parameters not allow type variation? See the blog page for more commentary on this issue. Thanks for the great question. ============= Let's suppose you have classes Animal, Mammal, Reptile, Giraffe, Turtle and Ti...
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What's the difference between faking, mocking, and stubbing?

...t I'm wondering if there are accepted definitions for faking , mocking , and stubbing for unit tests? How do you define these for your tests? Describe situations where you might use each. ...