Stack Overflow Developer Survey 2018
Overview Developer Profile I. Geography II. Developer Roles III. Experience IV. Education V. Demographics VI. Connection and Competition VII. Life Outside Work Technology I. Most Popular Technologies II. Most Loved, Dreaded, and Wanted III. Development Environments and Tools IV. Top Paying Technologies V. Correlated Technologies VI. Technology and Society Work I. Employment II. Company Type III. C
What is a plain English explanation of "Big O" notation?
Quick note, my answer is almost certainly confusing Big Oh notation (which is an upper bound) with Big Theta notation "Θ" (which is a two-side bound). But in my experience, this is actually typical of discussions in non-academic settings. Apologies for any confusion caused. BigOh complexity can be visualized with this graph: The simplest definition I can give for Big Oh notation is this: Big Oh no
Stack Overflow: 100万人の開発者を手助けするVim終了方法 | POSTD
今朝のことですが、 Stack Overflowで人気のある質問 が1つの値を越えました。 注釈： 見出し: Vimエディタの終了方法を教えてください 質問者: jclancy 赤丸囲みの中: ビュー：1,000,082回 jclancyさん、あなただけではありません。この質問が投稿されてから5年、あなた以外に100万人以上の開発者がVimで身動きできなくなって、何らかの助けなしには抜け出せませんでした。実際、Vimエディタを終了させるのは難しく、開発者の間では共通のジョークになっています。 注釈： 誰も簡単にVimから抜け出せない ベテランのVimユーザからこういう評判は不当だと言われたことがあります。（私もやっとここ数年でこの問題についてのコツをつかんだのですが、）確かにベテランの言い分は正しいと思います。Vimの終了方法を忘れてしまうのには2つの理由があると思います。開発者は、Git
Is there a query language for JSON?
Is there a (roughly) SQL or XQuery-like language for querying JSON? I'm thinking of very small datasets that map nicely to JSON where it would be nice to easily answer queries such as "what are all the values of X where Y > 3" or to do the usual SUM / COUNT type operations. As completely made-up example, something like this: [{"x": 2, "y": 0}}, {"x": 3, "y": 1}, {"x": 4, "y": 1}] SUM(X) WHERE Y >
Load DBpedia locally using Jena TDB?
I need to perform a query against DBpedia: SELECT DISTINCT ?poi ?lat ?long ?photos ?template ?type ?label WHERE { ?poi <http://www.w3.org/2000/01/rdf-schema#label> ?label . ?poi <http://www.w3.org/2003/01/geo/wgs84_pos#lat> ?lat . ?poi <http://www.w3.org/2003/01/geo/wgs84_pos#long> ?long . ?poi <http://dbpedia.org/property/hasPhotoCollection> ?photos . OPTIONAL {?poi <http://dbpedia.org/property/w
Does "git fetch --tags" include "git fetch"?
Note: starting with git 1.9/2.0 (Q1 2014), git fetch --tags fetches tags in addition to what are fetched by the same command line without the option. To fetch only tags: git fetch <remote> 'refs/tags/*:refs/tags/*' In details: See commit c5a84e9 by Michael Haggerty (mhagger): Previously, fetch's "--tags" option was considered equivalent to specifying the refspec refs/tags/*:refs/tags/* on the comm
Rails ActiveRecord group_by & sum db results for use with Lazy HighCharts
I am completely new to RoR/Ruby and i am using Lazy High Charts gem to generate some purdy charts based on some database information. I have tried the answers that were provided in a previous question but i am still a bit confused as to how to do this.. I need to sum amount_used, and billed_amount and group by month/year (e.g; Aug/2012) The end result will be something similar to a dual axis chart
The Ruby %r{ } expression
In a model there is a field validates :image_file_name, :format => { :with => %r{\.(gif|jpg|jpeg|png)$}i It looks pretty odd for me. I am aware that this is a regular expression. But I would like: to know what exactly it means. Is %r{value} equal to /value/ ? be able to replace it with normal Ruby regex operator /some regex/ or =~. Is this possible?
How to pass "Null" (a real surname!) to a SOAP web service in ActionScript 3
We have an employee whose surname is Null. Our employee lookup application is killed when that last name is used as the search term (which happens to be quite often now). The error received is: <soapenv:Fault> <faultcode>soapenv:Server.userException</faultcode> <faultstring>coldfusion.xml.rpc.CFCInvocationException: [coldfusion.runtime.MissingArgumentException : The SEARCHSTRING parameter to the g
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