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Python __call__ special method practical example
...method nicely to implement a consistent API for form validation. You can write your own validator for a form in Django as a function.
def custom_validator(value):
#your validation logic
Django has some default built-in validators such as email validators, url validators etc., which broadly fa...
What is HEAD in Git?
You see the Git documentation saying things like
21 Answers
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Find the last element of an array while using a foreach loop in PHP
I am writing a SQL query creator using some parameters. In Java, it's very easy to detect the last element of an array from inside the for loop by just checking the current array position with the array length.
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Runnable with a parameter?
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Well it's been almost 9 years since I originally posted this and to be honest, Java has made a couple improvements since then. I'll leave my original answer below, but there's no need for people to do what is in it. 9 years ago, d...
How to set focus on input field?
...edefined <input> inside this Modal.
Define a directive and have it $watch a property/trigger so it knows when to focus the element:
Name: <input type="text" focus-me="shouldBeOpen">
app.directive('focusMe', ['$timeout', '$parse', function ($timeout, $parse) {
return {
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Will strlen be calculated multiple times if used in a loop condition?
I'm not sure if the following code can cause redundant calculations, or is it compiler-specific?
18 Answers
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Unwanted padding around an ImageView
I need to include a header graphic in all of my activities/views. The file with the header is called header.xml:
8 Answers
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Makefiles with source files in different directories
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The traditional way is to have a Makefile in each of the subdirectories (part1, part2, etc.) allowing you to build them independently. Further, have a Makefile in the root directory of the project which builds everything. The "root"...
How slow are .NET exceptions?
...g exceptions revolves around them being slow while the other side claims (with benchmark test) that the speed is not the issue. I've read numerous blogs, articles, and posts pertaining one side or the other. So which is it?
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TypeError: 'NoneType' object is not iterable in Python
What does error TypeError: 'NoneType' object is not iterable mean?
7 Answers
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