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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...
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...
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...
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...
Generate GUID in MySQL for existing Data?
...b338f99021cbd24096302 |
| Abaetetuba | 9dd331c21b983c3a68d00ef6e5852bb5 |
| Abakan | e2206290ce91574bc26d0443ef50fc05 |
| Abbotsford | 50ca17be25d1d5c2ac6760e179b7fd15 |
| Abeokuta | ab026fa6238e2ab7ee0d76a1351f116f |
| Aberdeen | d...
How to link to specific line number on github
... change to become something like this:
https://github.com/git/git/blob/5bdb7a78adf2a2656a1915e6fa656aecb45c1fc3/README#L18-L20
That link contains the actual SHA hash for that particular commit, rather than the current version of the file on master. That means that this link will work forever and ...