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How should I validate an e-mail address?
What's a good technique for validating an e-mail address (e.g. from a user input field) in Android? org.apache.commons.validator.routines.EmailValidator doesn't seem to be available. Are there any other libraries doing this which are included in Android already or would I have to use RegExp?
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Difference between declaring variables before or in loop?
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Which is better, a or b?
From a performance perspective, you'd have to measure it. (And in my opinion, if you can measure a difference, the compiler isn't very good).
From a maintenance perspective, b is better. Declare and initialize variables in t...
What is the strict aliasing rule?
...sg;
void SendWord(uint32_t);
int main(void)
{
// Get a 32-bit buffer from the system
uint32_t* buff = malloc(sizeof(Msg));
// Alias that buffer through message
Msg* msg = (Msg*)(buff);
// Send a bunch of messages
for (int i = 0; i < 10; ++i)
{
m...
How do I check if a type is a subtype OR the type of an object?
...tly, no.
Here's the options:
Use Type.IsSubclassOf
Use Type.IsAssignableFrom
is and as
Type.IsSubclassOf
As you've already found out, this will not work if the two types are the same, here's a sample LINQPad program that demonstrates:
void Main()
{
typeof(Derived).IsSubclassOf(typeof(Base...
Can I Install Laravel without using Composer?
...webserver without having to use composer every time. Am I approaching this from the wrong angle?
– ryanwinchester
Apr 11 '13 at 3:55
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eval command in Bash and its typical uses
.... in a separate process that inherits all settings such as variable values from the current shell), and gathers its output. So echo $($n) runs $n as a shell command, and displays its output. Since $n evaluates to 1, $($n) attempts to run the command 1, which does not exist.
eval echo \${$n} runs th...
How can I measure the actual memory usage of an application or process?
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Doesn't exist on OSX (for anyone who comes here from google)
– jcollum
Mar 30 '16 at 15:44
3
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What is the difference between char array and char pointer in C?
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Is something changed from 2012 to now. For a character array "s" prints entire array.. i.e., "hello"
– Bhanu Tez
May 9 '19 at 6:48
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How can I make git ignore future revisions to a file?
... @AdamDymitruk: Yes, clean/smudge can be used in this case, but it's far from clear that that is the best option. For example, this will make it rather hard if people really want to change the file, as the clean/smudge will get in the way. I would actually prefere the approach described here.
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Why are const parameters not allowed in C#?
...uage. void foo(const A& a) that modifies the object a is not different from int countApples(Basket b) that return the number of pears. It is just a bug, a bug that compile in any language.
– Alessandro Teruzzi
Sep 25 '15 at 14:41
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