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How to wait for several Futures?
... fail, whereas with for comprehension you get the first error in traversal order of the input collection (even if another one failed first). For example:
val f1 = Future { Thread.sleep(1000) ; 5 / 0 }
val f2 = Future { 5 }
val f3 = Future { None.get }
Future.sequence(List(f1,f2,f3)).onFailure{case...
C library function to perform sort
...0.5.2 The qsort function" Point 4 "If two elements compare as equal, their order in the resulting sorted array is unspecified."
– 12431234123412341234123
Nov 27 '18 at 16:41
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How to customise file type to syntax associations in Sublime Text?
...llows you to enable syntax for composite extensions (e.g. sql.mustache, js.php, etc ... )
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How to install Google Play Services in a Genymotion VM (with no drag and drop support)?
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In order to update Google Play, you can open Google Play, go to Settings and click on the Build Version.
– dr.scre
Aug 28 '14 at 13:30
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How to get the input from the Tkinter Text Widget?
...ly issue with this is that it actually adds a newline to our input. So, in order to fix it we should change END to end-1c(Thanks Bryan Oakley) The -1c deletes 1 character, while -2c would mean delete two characters, and so on.
def retrieve_input():
input = self.myText_Box.get("1.0",'end-1c')
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How to amend several commits in Git to change author
...author-info, which also adds --tag-name-filter cat to the filter-branch in order to migrate tags to the new history. It also uses --branches --tags instead of --all, which only rewrites branch and tag history and leaves other refs alone (though that probably doesn't make much of a difference unless ...
互联网造车运动 - 资讯 - 清泛网 - 专注C/C++及内核技术
...长达十年之久，此外，特斯拉还学习了丰田的质量控制和问题追溯体系，还有奔驰的测试流程，传统汽车企业的支持是特斯拉成功的左右手，这都需要长时间去消化。互联网企业一时半会难以造出获得消费者认可的汽车。
不过...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
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shell> ldd /path/to/nginx
libluajit-<VERSION>.so => not found
此类问题通常使用ldconfig命令就能解决：
shell> echo "/usr/local/lib" > /etc/ld.so.conf.d/usr_local_lib.conf
shell> ldconfig
再试着启动Nginx看看，应该就OK了。
应用
我们先用一个简单的程序...
MySql Table Insert if not exist otherwise update
...safe. (Bug #11765650, Bug #58637) Bug 58637 description bugs.mysql.com/bug.php?id=58637
– broadband
Sep 2 '14 at 13:28
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How to normalize an array in NumPy?
...iving optimal performance.
import numpy as np
def normalized(a, axis=-1, order=2):
l2 = np.atleast_1d(np.linalg.norm(a, order, axis))
l2[l2==0] = 1
return a / np.expand_dims(l2, axis)
A = np.random.randn(3,3,3)
print(normalized(A,0))
print(normalized(A,1))
print(normalized(A,2))
prin...