大约有 18,144 项符合查询结果（耗时：0.0248秒） [XML]
Why is arr = [] faster than arr = new Array?
...
5 Answers
5
Active
...
Understanding ibeacon distancing
... grasp a basic concept of how distancing with ibeacon (beacon/ Bluetooth-lowenergy/BLE) can work. Is there any true documentation on how far exactly an ibeacon can measure. Lets say I am 300 feet away...is it possible for an ibeacon to detect this?
...
What is the advantage to using bloom filters?
...
5 Answers
5
Active
...
How do you manage databases in development, test, and production?
...trying to find good examples of how to manage database schemas and data between development, test, and production servers.
...
Is JavaScript a pass-by-reference or pass-by-value language?
...but objects are unknown, because they can be both passed-by-value (in case we consider that a variable holding an object is in fact a reference to the object) and passed-by-reference (when we consider that the variable to the object holds the object itself).
...
What does the “at” (@) symbol do in Python?
...
12 Answers
12
Active
...
Why do we check up to the square root of a prime number to determine if it is prime?
To test whether a number is prime or not, why do we have to test whether it is divisible only up to the square root of that number?
...