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How do I check to see if a value is an integer in MySQL?
...XP '^-?[0-9]+$';
this is reasonably fast. If your field is numeric, just test for
ceil(field) = field
instead.
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How do I copy items from list to list without foreach?
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For a list of elements
List<string> lstTest = new List<string>();
lstTest.Add("test1");
lstTest.Add("test2");
lstTest.Add("test3");
lstTest.Add("test4");
lstTest.Add("test5");
lstTest.Add("test6");
If you want to copy all the elements
List<string> ...
How do I seed a random class to avoid getting duplicate random values [duplicate]
...tes a sequence of numbers that adequately satisfies statistical randomness tests. Since the algorithm is deterministic, the algorithm will always generate the exact same sequence of numbers if it's initialized with the same seed. That's why system time (something that changes all the time) is usuall...
Eclipse Optimize Imports to Include Static Imports
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For SpringFramework Tests, I would recommend to add the below as well
org.springframework.test.web.servlet.request.MockMvcRequestBuilders
org.springframework.test.web.servlet.request.MockMvcResponseBuilders
org.springframework.test.web.servlet...
How to use android emulator for testing bluetooth application?
...o run it on the Android Emulator. How can I use the emulator for bluetooth testing?
2 Answers
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IEnumerable to string [duplicate]
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Edited for the release of .Net Core 2.1
Repeating the test for the release of .Net Core 2.1, I get results like this
1000000 iterations of "Concat" took 842ms.
1000000 iterations of "new String" took 1009ms.
1000000 iterations of "sb" took 902ms.
In short, if you are using .Ne...
Citing the author of a blockquote using Markdown syntax
...e. Generated from https://en.wikipedia.org/wiki/Special:CiteThisPage
> Test-driven development (TDD) is a software development process that relies on the repetition of a very short development cycle: requirements are turned into very specific test cases, then the software is improved to pass the...
Collisions when generating UUIDs in JavaScript?
... the first report I've seen of anyone getting collisions.
node-uuid has a test harness that you can use to test the distribution of hex digits in that code. If that looks okay then it's not Math.random(), so then try substituting the UUID implementation you're using into the uuid() method there an...
#ifdef replacement in the Swift language
... usual, you can set a different value when in Debug or when in Release.
I tested it in real code and it works; it doesn't seem to be recognized in a playground though.
You can read my original post here.
IMPORTANT NOTE: -DDEBUG=1 doesn't work. Only -D DEBUG works. Seems compiler is ignoring a f...
BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...化，因此造成了上述情况。
【例二】
编译如下程序（test.cpp）：
#include <stdio.h>
#define LEN 1002000
int inbss[LEN];
float fA;
int indata[LEN]={1,2,3,4,5,6,7,8,9};
double dbB = 100.0;
const int cst = 100;
int main(void)
{
int run[100] = {1,2,3,4,5,6,7,8,9};
...