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Ruby: How to turn a hash into HTTP parameters?
... characters, and there are a few other edge cases where it breaks down.
require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a => "a", :b => ["c", "d", "e"]}
uri.query
# => "a=a&b[0]=c&b[1]=d&b[2]=e"
uri.query_values = {:a => "a", :b => [{:c => "c"...
How to do a LIKE query in Arel and Rails?
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This is how you perform a like query in arel:
users = User.arel_table
User.where(users[:name].matches("%#{user_name}%"))
PS:
users = User.arel_table
query_string = "%#{params[query]}%"
param_matches_string = ->(param){
users[param].matches(query...
How do I link to Google Maps with a particular longitude and latitude?
... map with the marker (via aaronm's comment):
https://www.google.com/maps/?q=-15.623037,18.388672
For an older example (no marker on this one):
https://www.google.com/maps/preview/@-15.623037,18.388672,8z
The oldest format:
http://maps.google.com/maps?ll=-15.623037,18.388672&spn=65.61535,79...
How does Google Instant work?
...behind the scenes. It's an interesting read, and obviously related to this question. You can read how they tackled the extra load (5-7X according to the article) on the server-side, for example. The answer below examines what happens on the client-side:
Examining with Firebug, Google is doing an ...
What would cause an algorithm to have O(log n) complexity?
My knowledge of big-O is limited, and when log terms show up in the equation it throws me off even more.
6 Answers
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How do I repeat an edit on multiple lines in Vim?
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:10,20s/^/,/
Or use a macro, record with:
q a i , ESC j h q
use with:
@ a
Explanation: q a starts recording a macro to register a, q ends recording. There are registers a to z available for this.
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30岁之后，程序员该向什么方向发展？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
30岁之后，程序员该向什么方向发展？QA&1. 初创公司在产品方向的确定上需要考量哪些核心因素？严清：我个人认为，个人原因是主因。程序员有这种焦虑是对自己的技术水平不自信...QA&1. 初创公司在产品方向的确定上需要考量...
How do you use vim's quickfix feature?
I'm a pretty new Vim user and I've found that its learning curve is quite steep (at least for me). I just installed this vim script for JavaScriptLint error checking, which shows errors in vim's quickfix window once I save a buffer.
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How do you attach and detach from Docker's process?
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To detach the tty without exiting the shell, use the escape sequence Ctrl+P followed by Ctrl+Q. More details here.
Additional info from this source:
docker run -t -i → can be detached with ^P^Qand reattached with docker attach
docker run -i → cannot be detached with ^P^Q; will di...
Correct way to detach from a container without stopping it
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Update: As mentioned in below answers Ctrl+p, Ctrl+q will now turn interactive mode into daemon mode.
Well Ctrl+C (or Ctrl+\) should detach you from the container but it will kill the container because your main process is a bash.
A little lesson about docker.
The contain...