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Do rails rake tasks provide access to ActiveRecord models?
...
Figured it out, the task should look like:
namespace :test do
task :new_task => :environment do
puts Parent.all.inspect
end
end
Notice the => :environment dependency added to the task
sh...
String.Replace ignoring case
... don't have to escape the replacement string.
Here is a small fiddle that tests the code:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var tests = new[] {
new { Input="abcdef", Search="abc", Replacem...
Node.js vs .Net performance
...
I did a rudimentary performance test between nodejs and IIS.
IIS is about 2.5 times faster than nodejs when dishing out "hello, world!".
code below.
my hardware:
Dell Latitude E6510, Core i5 (dual core), 8 GB RAM, Windows 7 Enterprise 64 bit OS
node serve...
MySQL LIKE IN()?
... OR field LIKE '%1938 '
OR field LIKE '%1940 % test';
Use:
SELECT * FROM fiberbox WHERE field REGEXP '^1740 |1938 $|1940 (.*) test';
Placing ^ in front of the value indicates start of the line.
Placing $ after the value indicates end of line.
Placing (.*) behaves ...
Getting the first and last day of a month, using a given DateTime object
...ile remembering that clarity is important too.
Result
Here is an example test run result for 10 million iterations:
2257 ms for FirstDayOfMonth_AddMethod()
2406 ms for FirstDayOfMonth_NewMethod()
6342 ms for LastDayOfMonth_AddMethod()
4037 ms for LastDayOfMonth_AddMethodWithDaysInMonth()
4160 ms ...
How to add a line break in an Android TextView?
...
ok figured it out:
<string name="sample_string"><![CDATA[some test line 1 <br />some test line 2]]></string>
so wrap in CDATA is necessary and breaks added inside as html tags
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How do I limit the number of rows returned by an Oracle query after ordering?
... page, in the hope of preventing link rot.
Setup
CREATE TABLE rownum_order_test (
val NUMBER
);
INSERT ALL
INTO rownum_order_test
SELECT level
FROM dual
CONNECT BY level <= 10;
COMMIT;
What's in the table?
SELECT val
FROM rownum_order_test
ORDER BY val;
VAL
----------
...
Finding ALL duplicate rows, including “elements with smaller subscripts”
...
Hold on, I just ran a test and found I was wrong: x <- c(1:9, 7:10, 5:22); y <- c(letters, letters[1:5]); test <- data.frame(x, y); test[duplicated(test$x) | duplicated(test$x, fromLast=TRUE), ] Returned all three of he copies of 7, 8, an...
SQLite: How do I save the result of a query as a CSV file?
...v-mode and switch to file output.
sqlite> .mode csv
sqlite> .output test.csv
sqlite> select * from tbl1;
sqlite> .output stdout
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fo...
Query for documents where array size is greater than 1
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I believe this is the fastest query that answers your question, because it doesn't use an interpreted $where clause:
{$nor: [
{name: {$exists: false}},
{name: {$size: 0}},
{name: {$size: 1}}
]}
It means "all documents except those with...