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What are best practices for validating email addresses on iOS 2.0
... in great detail that the grammar specified in RFC 5322 is too complicated for primitive regular expressions.
I recommend a real parser approach like MKEmailAddress.
As quick regular expressions solution see this modification of DHValidation:
- (BOOL) validateEmail: (NSString *) candidate {
...
What is a “callback” in C and how are they implemented?
...ulate_array(int *array, size_t arraySize, int (*getNextValue)(void))
{
for (size_t i=0; i<arraySize; i++)
array[i] = getNextValue();
}
int getNextRandomValue(void)
{
return rand();
}
int main(void)
{
int myarray[10];
populate_array(myarray, 10, getNextRandomValue);
....
Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”
... path.
Make sure that the JAVA_HOME variable refers to the home directory for your Java installation. If you are executing Java from "E:\Sun\SDK\jdk\bin", then the JAVA_HOME variable needs to point to "E:\Sun\SDK\jdk".
NB: JAVA_HOME should NOT end with "\bin"1.
Make sure that you haven't put a se...
Looking to understand the iOS UIViewController lifecycle
...
ViewDidLoad - Called when you create the class and load from xib. Great for initial setup and one-time-only work.
ViewWillAppear - Called right before your view appears, good for hiding/showing fields or any operations that you want to happen every time before the view is visible. Because you mig...
How to update a record using sequelize for node?
... why Sequelize inserts a new record into the db.
First you need to search for that record, fetch it and only after that change its properties and update it, for example:
Project.find({ where: { title: 'aProject' } })
.on('success', function (project) {
// Check if record exists in db
if ...
How can I improve my paw detection?
...w , I started loading up other measurements to see how it would hold up. Unfortunately, I quickly ran into a problem with one of the preceding steps: recognizing the paws.
...
What does the C++ standard state the size of int, long type to be?
I'm looking for detailed information regarding the size of basic C++ types.
I know that it depends on the architecture (16 bits, 32 bits, 64 bits) and the compiler.
...
Create a dictionary on a list with grouping
...
i thought that a lookup performs not that good, compared to a built dictionary, in a longterm-environment, due it builds up the result fresh for every request... please correct me, if i'm wrong!
– Andreas Niedermair
...
How to properly reuse connection to Mongodb across NodeJs application and modules
... the callback function of connectToServer. If you require them in app.js before _db is set, then you'll get undefined errors in the other modules.
– Mike R
Feb 17 '18 at 21:40
2
...
Find running median from a stream of integers
...
There are a number of different solutions for finding running median from streamed data, I will briefly talk about them at the very end of the answer.
The question is about the details of the a specific solution (max heap/min heap solution), and how heap based solu...