Rails: Custom ordering of records
Does ruby or rails provide a method to order strings in a specified order? Say that I have the following priorities "Severe, High, Medium, Low". These priorities are not going to change frequently (if at all). I have a Task model with a priority column: tasks - id (integer) - name (string) - priority (string) I'd like to get an array of all the tasks ordered by priority. Since the logical order do
Why does Google prepend while(1); to their JSON responses?
Why does Google prepend while(1); to their (private) JSON responses? For example, here's a response while turning a calendar on and off in Google Calendar: while (1); [ ['u', [ ['smsSentFlag', 'false'], ['hideInvitations', 'false'], ['remindOnRespondedEventsOnly', 'true'], ['hideInvitations_remindOnRespondedEventsOnly', 'false_true'], ['Calendar ID stripped for privacy', 'false'], ['smsVerifiedFla
What are metaclasses in Python?
Classes as objects Prior to delving into metaclasses, a solid grasp of Python classes is beneficial. Python holds a particularly distinctive concept of classes, a notion it adopts from the Smalltalk language. In most languages, classes are just pieces of code that describe how to produce an object. That is somewhat true in Python too: >>> class ObjectCreator(object): ... pass >>> my_object = Objec
Why is this program erroneously rejected by three C++ compilers?
I am having some difficulty compiling a C++ program that I've written. This program is very simple and, to the best of my knowledge, conforms to all the rules set forth in the C++ Standard. I've read over the entirety of ISO/IEC 14882:2003 twice to be sure. The program is as follows: Here is the output I received when trying to compile this program with Visual C++ 2010: c:\dev>cl /nologo helloworl
What are the lesser known but useful data structures?
There are some data structures around that are really useful but are unknown to most programmers. Which ones are they? Everybody knows about linked lists, binary trees, and hashes, but what about Skip lists and Bloom filters for example. I would like to know more data structures that are not so common, but are worth knowing because they rely on great ideas and enrich a programmer's tool box. PS: I
File I/O in Every Programming Language
This has to be a common question that all programmers have from time to time. How do I read a line from a text file? Then the next question is always how do i write it back. Of course most of you use a high level framework in day to day programming (which are fine to use in answers) but sometimes it's nice to know how to do it at a low level too. I myself know how to do it in C, C++ and Objective-
1
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
Git interoperability with a Mercurial Repository
How to specify mimetype of files with no extension in NGINX config?
What is (functional) reactive programming?
Is there a git-merge --dry-run option?
How do you inject impl of some interface in an Android Activity using Guice
Converting HTML to doc(x) and / or PDF
git ignoring .gitattributes pattern
How do I clone all remote branches?