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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...
Provide the :name option to add_index, e.g.:
add_index :studies,
["user_id", "university_id", "subject_name_id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in...
How do you comment out code in PowerShell?
...g the Send-MailMessage function, with backticks to put each paremeter on a new line, and commented out one of them ( -Bcc ) and it caused an error on the next line ( -Body : The term '-Body' is not recognized as the name of a cmdlet ...) So it seems commenting out a line in the middle of a call to ...
Git merge left HEAD marks in my files
...l = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
...
IDENTITY_INSERT is set to OFF - How to turn it ON?
I have a deleted file archive database that stores the ID of the file that was deleted, I want the admin to be able to restore the file (as well as the same ID for linking files). I do not want to take identity_insert off the entire table, as the increment by one works great. In my insert to TBL...
Rails 3: Get Random Record
... on an indexed column (PostgreSQL syntax):
select *
from my_table
where id >= trunc(
random() * (select max(id) from my_table) + 1
)
order by id
limit 1;
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Javascript checkbox onChange
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function calc()
{
if (document.getElementById('xxx').checked)
{
document.getElementById('totalCost').value = 10;
} else {
calculate();
}
}
HTML
<input type="checkbox" id="xxx" name="xxx" onclick="calc();"/>
...
python list in sql query as parameter
....join(placeholder for unused in l)
query= 'SELECT name FROM students WHERE id IN (%s)' % placeholders
cursor.execute(query, l)
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Jquery live() vs delegate() [duplicate]
... nor delegate is the best way to do event delegation in modern jQuery. The new syntax (as of jQuery 1.7) is with the on function. The syntax is as follows:
$('#containerElement').on('click', 'a.myClass', function() { ... });
...
How to start an application using android ADB tools?
...: This requires that you have aapt in your path. You can find it under the new build tools folder in the SDK.
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How to use GROUP BY to concatenate strings in SQL Server?
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[Note: This solution only works on SQL 2005 and later. Original question didn't specify the version in use.]
CREATE TABLE #YourTable ([ID] INT, [Name] CHAR(1), [Value] INT)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'A',4)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'B',8)
...