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What is the definition of “interface” in object oriented programming
Ok, a friend of mine go back and forth on what "interface" means in programming.
16 Answers
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ValueError: invalid literal for int() with base 10: ''
I am creating a program that reads a file and if the first line of the file is not blank, it reads the next four lines. Calculations are performed on those lines and then the next line is read. If that line is not empty it continues. However, I am getting this error:
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How can I change or remove HTML5 form validation default error messages?
For example I have a textfield . The field is mandatory, only numbers are required and length of value must be 10. When I try to submit form with value which length is 5, the default error message appears: Please match the requested format
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Possible to iterate backwards through a foreach?
I know I could use a for statement and achieve the same effect, but can I loop backwards through a foreach loop in C#?
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Store print_r result into a variable as a string or text
... displayed,
To save the data , so a simple thing, just declare a variable and assign the data to it..
for example you are printing some array like this..
print_r(myArray);
to save this, you just have to add an option , set Return to TRUE and assign it to a variable
$myVariable=print_r(myArray...
Can existing virtualenv be upgraded gracefully?
I have a virtualenv created for Python 2.5 and want to "upgrade" it to Python 2.6.
5 Answers
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Can I use __init__.py to define global variables?
...package. But I don't know how to do this. Suppose I have a few subpackages and each with several modules. How can I access that variable from these modules?
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Python: How to ignore an exception and proceed? [duplicate]
I have a try...except block in my code and When an exception is throw. I really just want to continue with the code because in that case, everything is still able to run just fine. The problem is if you leave the except: block empty or with a #do nothing, it gives you a syntax error. I can't use con...
I need this baby in a month - send me nine women!
...duals to be added to the project must have:
At least a reasonable understanding of the problem domain of the project
Be proficient in the language of the project and the specific technologies that they would use for the tasks they would be given
Their proficiency must /not/ be much less or much gr...
Is there a way to create your own html tag in HTML5?
...sers, although they won’t be HTML5 (see Are custom elements valid HTML5? and the HTML5 spec).
Let's assume you want to use a custom tag element called <stack>. Here's what you should do...
STEP 1
Normalize its attributes in your CSS Stylesheet (think css reset) -
Example:
stack{display...