大约有 1,645 项符合查询结果（耗时：0.0206秒） [XML]
How to remove convexity defects in a Sudoku square?
I was doing a fun project: Solving a Sudoku from an input image using OpenCV (as in Google goggles etc). And I have completed the task, but at the end I found a little problem for which I came here.
...
SET versus SELECT when assigning variables?
...(so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one)
When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from its previous valu...
What is Hindley-Milner?
...anguages). The advantages of Hindley-Milner are
It supports polymorphic functions; for example, a function that can give you the length of the list independent of the type of the elements, or a function does a binary-tree lookup independent of the type of keys stored in the tree.
Sometimes a func...
Why use Gradle instead of Ant or Maven? [closed]
...
Gradle put the fun back into building/assembling software. I used ant to build software my entire career and I have always considered the actual "buildit" part of the dev work being a necessary evil. A few months back our company grew tired...
How do Python functions handle the types of the parameters that you pass in?
Unless I'm mistaken, creating a function in Python works like this:
13 Answers
13
...
Why is list initialization (using curly braces) better than the alternatives?
...teger value cannot be converted to a floating-point type.
Example:
void fun(double val, int val2) {
int x2 = val; // if val==7.9, x2 becomes 7 (bad)
char c2 = val2; // if val2==1025, c2 becomes 1 (bad)
int x3 {val}; // error: possible truncation (good)
char c3 {val2}; // error...
What's the best strategy for unit-testing database-driven applications?
...o the production systems. At this point we'd have diverging schemas. Not fun.
Mocking Database Server:
We also do this at my current job. After every commit we execute unit tests against the application code that have mock db accessors injected. Then three times a day we execute the full db bu...
Why are preprocessor macros evil and what are the alternatives?
... actually know what is going on.
Replacement: Use enum or const T
For "function-like" macros, because the debugger works on a "per source line where you are" level, your macro will act like a single statement, no matter if it's one statement or a hundred. Makes it hard to figure out what is goin...
What is the maximum amount of RAM an app can use?
...rtions of available RAM are good enough for cache in my case (1% and 3%).
Fun fact: Android does not have any APIs or other hacks to get the amount of memory allocated to your app, it's calculated on the fly based on various factors.
P.S. I'm using a static class field to hold a cache but as per...
Batch script: how to check for admin rights
...
They've probably patched it yes. It was fun while it lasted.
– script'n'code
Apr 23 '17 at 16:01