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Merge/flatten an array of arrays
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Usage:
flatten([[1, 2, 3], [4, 5]]); // [1, 2, 3, 4, 5]
flatten([[[1, [1.1]], 2, 3], [4, 5]]); // [1, 1.1, 2, 3, 4, 5]
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How to find out which package version is loaded in R?
...plyr_1.7.1
loaded via a namespace (and not attached):
[1] colorspace_1.1-1 dichromat_1.2-4 digest_0.5.2 MASS_7.3-18 memoise_0.1 munsell_0.3
[7] proto_0.3-9.2 RColorBrewer_1.0-5 scales_0.2.0 stringr_0.6
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However, as per comments and the ...
Android emulator and virtualbox cannot run at same time
...u have the latest version of Intel Emulator Accelerator HAXM installed (v6.1.1) .
Go to the extras directory of the Android SDK location displayed in the preferences. On MacOS you can do this:
open ~/Library/Android/sdk/extras
Install the HAXM packing by opening IntelHAXM_6.1.1.dmg, then opening I...
How can I get Docker Linux container information from within the container itself?
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Aaaaand Docker 1.12: cat /proc/1/cgroup | grep 'docker/' | tail -1 | sed 's/^.*\///' | cut -c 1-12
– smets.kevin
Jul 27 '16 at 21:05
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RESTful API methods; HEAD & OPTIONS
...ties of the server. For example, this can be used to test a proxy for HTTP/1.1 compliance (or lack thereof).
If the Request-URI is not an asterisk, the OPTIONS request applies only to the options that are available when communicating with that resource.
A 200 response SHOULD include any header field...
Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...支援函式所指定的socket型別。舉例來說,完全根據WinSock 1.1版的規格書發展的WinSock協定核心,並不支援SOCK_RAW這個socket型別。在呼叫socket()函式時,位址家族選 AF_INET( PF_INET )而socket型別選SOCK_RAW的話,就會發生這個錯誤。
有些...
What should a Multipart HTTP request with multiple files look like? [duplicate]
... non-printable-ascii character into a dot (".").
POST /cgi-bin/qtest HTTP/1.1
Host: aram
User-Agent: Mozilla/5.0 Gecko/2009042316 Firefox/3.0.10
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-...
pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible
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Answer for pydot >= 1.1:
The incompatibility of (upstream) pydot has been fixed by 6dff94b3f1, and thus pydot >= 1.1 will be compatible with pyparsing >= 1.5.7.
Answer applicable to pydot <= 1.0.28:
For anyone else who comes across...
How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
... 6.0 = 50,
Java SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45
(Source: Wikipedia)
To fix the actual problem you should try to either run the Java code with a newer version of Java JRE or specify the target parameter to the Java compiler to instruct the compiler to create cod...
RESTful Authentication
...tandard HTTPS protocol, is used by most web services.
GET /spec.html HTTP/1.1
Host: www.example.org
Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==
It's easy to implement, available by default on all browsers, but has some known drawbacks, like the awful authentication window displayed on the B...
