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How to avoid reinstalling packages when building Docker image for Python projects?
...tep 5 : CMD python /srv/run.py
---> Running in f25c21135010
---> 4ffab7bc66c7
Removing intermediate container f25c21135010
Successfully built 4ffab7bc66c7
As you can see above, this time docker uses cache during the build. Now, let's update requirements.txt:
# requirements.txt
pytest==2.3.4
...
Are default enum values in C the same for all compilers?
...limits.h>
enum E {
E0,
E1,
E2 = 3,
E3 = 3,
E4,
E5 = INT_MAX,
#if 0
/* error: overflow in enumeration values */
E6,
#endif
};
int main(void) {
/* If unspecified, the first is 0. */
assert(E0 == 0);
assert(E1 == 1);
/* Repeated number, no problem. *...
Arduino101（Genuino 101）&App Inventor – RGB LED控制 - 创客硬件开...
繁体中文原文：https://blog.cavedu.com/2017/02/ ... %e6%8e%a7%e5%88%b6/
本文將介紹如何取得觸碰點的 RGB 參數之後透過 BLE 送給 Arduino 101 來點亮 RGB LED。
App InventorDesigner使用 Canvas 來取得觸碰點座標。兩個連線斷線用的按鈕：Btn_Connect /&n...
Hex transparency in colors [duplicate]
...2.5 increment, add 2 to the first and 3 to the next
95% — F2 // start
96% — F4 // add 2 to F2
97% — F7 // add 3 . Or F2 + 5 = F7
98% — F9 // add 2
99% — FC // add 3. 9 + 3 = 12 in hexa : C
100% — FF // add 2
I prefer to teach how to find the solution rather than showing an...
Moving average or running mean
... more points you accumulate over the greater the floating point error (so 1e5 points is noticable, 1e6 points is more significant, more than 1e6 and you may want to resetting the accumulators)
you can cheat by using np.longdouble but your floating point error still will get significant for relativel...
Find which commit is currently checked out in Git
...to. For a more concise version, you can do:
$ git show --oneline -s
c0235b7 Autorotate uploaded images based on EXIF orientation
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How can I generate a self-signed certificate with SubjectAltName using OpenSSL? [closed]
... Version: 3 (0x2)
Serial Number: 9647297427330319047 (0x85e215e5869042c7)
Signature Algorithm: sha256WithRSAEncryption
Issuer: C=US, ST=MD, L=Baltimore, O=Test CA, Limited, CN=Test CA/emailAddress=test@example.com
Validity
Not Before: Feb 1 05:23:05 2014...
Ubuntu, vim, and the solarized color palette
...2A2AA1A19898:#EEEEE8E8D5D5:#00002B2B3636:#CBCB4B4B1616:#58586E6E7575:#65657B7B8383:#838394949696:#6C6C7171C4C4:#9393A1A1A1A1:#FDFDF6F6E3E3"
gconftool-2 --set "/apps/gnome-terminal/profiles/Default/background_color" --type string "#00002B2B3636"
gconftool-2 --set "/apps/gnome-terminal/profiles/Defaul...
外部打开使用指导 · App Inventor 2 中文网
...ntent.action.VIEW -d 'componentcase://device?id=42&name=%E4%BC%A0%E6%84%9F%E5%99%A8'
应由系统打开案例，事件区显示id 42、name 传感器。如果系统没有找到处理应用，请确认安装的是此案例独立包、设计器链接前缀为 componentcase，且重新编译安装。...
iTunes音乐搜索 · App Inventor 2 中文网
... 网址里不能直接出现中文和空格，
周杰伦 得先转换成 %E5%91%A8%E6%9D%B0%E4%BC%A6 这样的形式才能发出去。
UriEncode 就是干这个的——少了它，搜英文歌手名（Jay Chou 中间有空格）
和搜中文歌手名都会失败。
Web客户端1.执行GET请求() ...