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MySQL, better to insert NULL or empty string?
I have a form on a website which has a lot of different fields. Some of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data?
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Combine two ActiveRecord::Relation objects
...irst_name_relation.or(last_name_relation)
† Only in ActiveRecord 5+; for 4.2 install the where-or backport.
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jQuery ID starts with
...is my jQuery code. I am trying to use a JavaScript variable when searching for items. But it does not work. What am I missing below? So the id 'value' am searching is the value of the clicked element
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CSS How to set div height 100% minus nPx
...nd #right will display a vertical scrollbar if their content is too high.
For this to work under IE7, you have to trigger the standards-compliant mode by adding a DOCTYPE :
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html&...
HTML5 input type range show range value
... mobile-web-app.blogspot.com/2012/03/… , still javascript. code<label for="rangeinput">Range</label> <input id="rangeinput" type="range" min="0" max="10" value="5" onchange="rangevalue.value=value"></input> <output id="rangevalue">5</output>
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Input text dialog Android
...s, Android does not have a built-in dialog to do this (as far as I know). Fortunately, it's just a little extra work on top of creating a standard AlertDialog. You simply need to create an EditText for the user to input data, and set it as the view of the AlertDialog. You can customize the type o...
Android getting value from selected radiobutton
...from mykong link...instead of using button how can we get the selected id..for multiple radio group.
– ajey
Feb 12 '14 at 4:43
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Python/postgres/psycopg2: getting ID of row just inserted
...ndred_slug, status))
hundred = cursor.fetchone()[0]
See the psycopg docs for more details: http://initd.org/psycopg/docs/usage.html#passing-parameters-to-sql-queries
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Immutable vs Mutable types
... edited Jun 26 '13 at 8:18
Forethinker
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answered Nov 9 '11 at 1:50
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Select row with most recent date per user
...wed to create a view with this query even though it contains subqueries. before, when i tried to create a view containing subqueries, it didn't let me. are there rules as to why this is allowed but another one isn't?
– Keith
Jun 11 '13 at 7:24
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