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Why am I getting “undefined reference to sqrt” error even though I include math.h header? [duplicate
...aries by environment, but in Linux/Unix, just add -lm to the command:
gcc test.c -o test -lm
The math library is named libm.so, and the -l command option assumes a lib prefix and .a or .so suffix.
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How can we access context of an application in Robolectric?
...ment.application;
And for version 4.x:
add to your build.gradle file:
testImplementation 'androidx.test:core:1.0.0'
retrieve the context with:
ApplicationProvider.getApplicationContext()
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.reg文件删除注册表项和值 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 前放置一个连字符 (-)。例如，要从以下注册表项中删除 Test 子...要使用 .reg 文件删除注册表项，请在 .reg 文件中的 RegistryPath 前放置一个连字符 (-)。例如，要从以下注册表项中删除 Test 子项：
HKEY_LOCAL_MACHINE\Software
请在 .reg 文...
Linux scp 远程文件上传下载，指定端口 - 操作系统(内核) - 清泛网 - 专注C...
...载，指定端口linux-scp1、默认22端口上传、下载文件：scp test tgz root@xxx xxx xxx xxx: tmpscp root@xxx xxx xxx xxx: tmp test tgz 2、指定端口：scp -P8888 root@xxx xxx xxx xxx: tmp test tgz 1、默认22端口上传、下载文件：
scp test.tgz root@xxx.xxx.xxx.xxx:/tmp
s...
What's a good way to extend Error in JavaScript?
...e object that is being thrown. Those things are guaranteed to be correct.
Test cases I used can be found here: JavaScript self-made Error object comparison.
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Best way to detect Mac OS X or Windows computers with JavaScript or jQuery
...r.platform property is not spoofed when the userAgent string is changed.
I tested on my Mac if I change the userAgent to iPhone or Chrome Windows, navigator.platform remains MacIntel.
The property is also read-only
I could came up with the following table
Mac Computers
Mac68K ...
how to convert from int to char*?
...ger64ToCharArray(int64_t value);
https://github.com/JeremyDX/All-Language-Testing-Code/blob/master/C%2B%2B%20Examples/IntegerToCharArrayTesting.cpp
Feel free to try cleaning that code up without hindering performance.
Input: Any signed 64 bit value from min to max range.
Example:
std::cout <...
Best way to require all files from a directory in ruby?
...s require is not confused by the presence or absence of the .rb extension. Tested on MRI 1.8.7-p374, 2.1.5 and 2.2.0 tested. This urban legend comes from Rails, where "clever" autoloading exhibited the behaviour he describes in older versions (and may still exhibit it).
– sheld...
Do you continue development in a branch or in the trunk? [closed]
...ild setups. That's what continuous integration is all about! You have QA test your branches not your mainline trunk.
– PositiveGuy
May 21 '10 at 14:05
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@RequestParam vs @PathVariable
...aram is used to extract query parameters
http://localhost:3000/api/group/test?id=4
@GetMapping("/group/test")
public ResponseEntity<?> test(@RequestParam Long id) {
System.out.println("This is test");
return ResponseEntity.ok().body(id);
}
while @PathVariable is used to extract da...