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How to check if PHP array is associative or sequential?
...y, how to determine whether an array has sequential numeric keys, starting from 0
Consider which of these behaviours you actually need. (It may be that either will do for your purposes.)
The first question (simply checking that all keys are numeric) is answered well by Captain kurO.
For the seco...
Default value of function parameter
... file, and the definition in a separate .cpp file, and #include the header from a different .cpp file, you will be able to see the difference.
Specifically, suppose:
lib.h
int Add(int a, int b);
lib.cpp
int Add(int a, int b = 3) {
...
}
test.cpp
#include "lib.h"
int main() {
Add(4);...
How do I set a variable to the output of a command in Bash?
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Some Bash tricks I use to set variables from commands
Sorry, there is a loong answer, but there is more than one solution, shorter or quicker, more or less system friendly...
3rd Edit: 2020-09-05: About {fdname}<> syntax under bash See at top of bash features...
Cannot refer to a non-final variable inside an inner class defined in a different method
...hrough the timer. I cannot set the values to final as that will prevent me from updating the values however I am getting the error I describe in the initial question below:
...
What is the “right” JSON date format?
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It is maybe also worth mentioning that (milli)seconds from 1970 isn't predictable for dates in the future because we have leap seconds. So I wouldn't use if for inter-process communication and data storage. It is however nice to use internally in a program since it can be stored...
Why does the order of the loops affect performance when iterating over a 2D array?
...ter? All memory accesses are the same, right?
No: because of caches. Data from your memory gets brought over to the CPU in little chunks (called 'cache lines'), typically 64 bytes. If you have 4-byte integers, that means you're geting 16 consecutive integers in a neat little bundle. It's actually f...
What is [Serializable] and when should I use it?
...bject to a remote application by means of a Web Service, passing an object from one domain to another, passing an object through a firewall as an XML string, or maintaining security or user-specific information across applications.
Apply SerializableAttribute to a type to indicate that instances of ...
java.util.Date vs java.sql.Date
...36123. These magic numbers can be used in SQL queries and will be portable from database to another and will let you avoid this part of JDBC/Java Date API:s entirely.
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Purpose of #!/usr/bin/python3
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That's called a hash-bang. If you run the script from the shell, it will inspect the first line to figure out what program should be started to interpret the script.
A non Unix based OS will use its own rules for figuring out how to run the script. Windows for example will...
Choosing between MEF and MAF (System.AddIn)
...application. It also provides a very complete way of decoupling the addons from depending on anything but the contract you give them. In fact, you can versionize your contract adapters to provide backwards compatibility to old addons while you are upgrading the main App. While this sounds great, i...