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Group by multiple columns in dplyr, using string vector input
...t contains bunch of wrapper functions like s_group_by, s_mutate, s_filter, etc that use string arguments. You can mix them with the normal dplyr functions. For example
cols = c("cyl","gear")
mtcars %.%
s_group_by(cols) %.%
s_summarise("avdisp=mean(disp), max(disp)") %.%
arrange(avdisp)
...
Error handling with node.js streams
...async calls, for example, or derive a couple of fields, remap some things, etc.
For how to create a transform stream see here and here. All you have to do is :
include the stream module
instantiate ( or inherit from) the Transform class
implement a _transform method which takes a (chunk,...
CSS: 100% font size - 100% of what?
... and vertical resolution. For Flash content with NO_SCALE, e.g. web-apps, etc., the controls will be tiny, especially menus, for example on an LG G3. This is equally true for some HTML content that's sized to pixels. One way or another, pixel density (pixels per inch), must be taken into account,...
Neo4j - Cypher vs Gremlin query language
...clude an alternate path expander (apoc.path.expand, apoc.path.subgraphAll, etc).
Gremlin is harder to learn but it's more powerful than Cypher and APOC. You can implement any logic you can think of in Gremlin.
I really wish Neo4J shipped with a toggleable Gremlin server (from reading around, this...
Does Typescript support the ?. operator? (And, what's it called?)
...eturns the first value that evaluated to false. That may be 0, null, false etc. || returns the first value that evaluates to true.
– A. K-R
Mar 8 '16 at 14:29
34
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Razor MVC Populating Javascript array with Model Array
....push(ClassMember1: "@d.ClassMember1", ClassMember2: "@d.ClassMember2");
etc.
Furthermore, if you want to pass the array as a parameter to your controller, you can stringify it first:
myArray = JSON.stringify({ 'myArray': myArray });
...
Common CSS Media Queries Break Points [duplicate]
...nt on different mobile devices and updating CSS for each element (ul, div, etc.) not displaying correctly for that breakpoint.
So far that was working on multiple responsive websites I've made.
/* SMARTPHONES PORTRAIT */
@media only screen and (min-width: 300px) {
}
/* SMARTPHONES LANDSCAPE */
...
Multiline strings in JSON
...nstead provides for their representation via escape sequences (\\, \r, \n, etc.).
– user359996
Jul 15 '16 at 19:30
...
Are static variables shared between threads?
...ince the ThreadGroup must terminate as well if no daemon threads are left, etc).
The started thread ReaderThread is going to keep the process alive since it is not a daemon one!
Thus ready and number will be flushed together (or the number before if a context switch occurs) and there is no real re...
How do I install and use curl on Windows?
...ou want cygwin builds, third-party builds, libcurl, header files, sources, etc.), use the curl download wizard. After answering five questions, you will be presented with a list of download links.
Extracting and setting up curl
Find curl.exe within your downloaded package; it's probably under bin\.
...