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What is Data Transfer Object?
... needs to be sent across the wire in distributed applications. They also make great models in the MVC pattern.
Another use for DTOs can be to encapsulate parameters for method calls. This can be useful if a method takes more than 4 or 5 parameters.
When using the DTO pattern, you would also make u...
Can someone explain in simple terms to me what a directed acyclic graph is?
... explain in simple terms to me what a directed acyclic graph is? I have looked on Wikipedia but it doesn't really make me see its use in programming.
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CSS Classes & SubClasses
Is it possible, other than what I'm doing because it doesn't seem to work, to do this? I want to be able to have subclasses that are under a class to use the CSS specifically for that class.subclass.
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How can I check whether Google Maps is fully loaded?
...edding Google Maps into my web site. Once Google Maps is loaded, I need to kick off a few JavaScript processes.
9 Answers
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Android dex gives a BufferOverflowException when building
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No need to downgrade the build tools back to 18.1.11, this issue is fixed with build tools 19.0.1.
If you can't use 19.0.1 for some reason then:
Make sure that the value of android:targetSdkVersion in AndroidManifest.xml matches target=android-<value> in pr...
How do I generate random integers within a specific range in Java?
...ndom;
// nextInt is normally exclusive of the top value,
// so add 1 to make it inclusive
int randomNum = ThreadLocalRandom.current().nextInt(min, max + 1);
See the relevant JavaDoc. This approach has the advantage of not needing to explicitly initialize a java.util.Random instance, which can be...
How to get a substring between two strings in PHP?
...g whether there is a php function that achieves that. I do not want to think about regex (well, I could do one but really don't think it's the best way to go). Thinking of strpos and substr functions.
Here's an example:
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Center image using text-align center?
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That will not work as the text-align property applies to block containers, not inline elements, and img is an inline element. See the W3C specification.
Use this instead:
img.center {
display: block;
margin: 0 auto;
}
<di...
How do you clear a stringstream variable?
... to eofbit (end-of-file), then calling clear() will set the error state back to goodbit (no error).
For clearing the contents of a stringstream, using:
m.str("");
is correct, although using:
m.str(std::string());
is technically more efficient, because you avoid invoking the std::string constr...
Vim: faster way to select blocks of text in visual mode
I have been using vim for quite some time and am aware that selecting blocks of text in visual mode is as simple as SHIFT + V and moving the arrow key up or down line-by-line until I reach the end of the block of text that I want selected.
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