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Django CharField vs TextField
...lied.
for TextField(description) the field is defined as a longtext
ALTER TABLE `sometable_sometable` ADD COLUMN `description` longtext NULL;
The maximum length of TextField of MySQL is 4GB according to string-type-overview.
for CharField(title) the max_length(required) is defined as varchar(64)
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Trim string in JavaScript?
...pt-5-support-and-more.aspx
Chrome: 5+
Opera: 10.5+
ECMAScript 5 Support Table: http://kangax.github.com/es5-compat-table/
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PHP date() format when inserting into datetime in MySQL
...nsforming it by using the FROM_UNIXTIME function.
mysql> insert into a_table values(FROM_UNIXTIME(1231634282));
Query OK, 1 row affected (0.00 sec)
mysql> select * from a_table;
+---------------------+
| a_date |
+---------------------+
| 2009-01-10 18:38:02 |
+----------------...
Types in MySQL: BigInt(20) vs Int(20)
... will accept.
Practically, it affects only the ZEROFILL option:
CREATE TABLE foo ( bar INT(20) ZEROFILL );
INSERT INTO foo (bar) VALUES (1234);
SELECT bar from foo;
+----------------------+
| bar |
+----------------------+
| 00000000000000001234 |
+----------------------+
It'...
python pandas dataframe to dictionary
...
Nice and elegant solution, but on a 50k rows table, it is about 6 times slower than my ugly solution below.
– dalloliogm
Jun 24 '14 at 10:44
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What are the differences between “=” and “
...expression). In fact, ?Syntax in R gives the following operator precedence table, from highest to lowest:
…
‘-> ->>’ rightwards assignment
‘<- <<-’ assignment (right to left)
‘=’ assignment (right to left)
…
But is this the on...
Rails find record with zero has_many records associated [duplicate]
... do includes it does a join. In a SQL join, you get all the fields of both tables (in this case cities and photos) for each row unless you change the projection of the query. So, he's using that to his advantage to check whether a required database identifier is present. If it's not, then there was ...
How do BitTorrent magnet links work?
... this using a separate peer-to-peer network2 operating a "distributed hash table" (DHT). A DHT is a big distributed index which maps torrents (identified by infohashes) to lists of peers (identified by IP address and ports) who are participating in a swarm for that torrent (uploading/downloading dat...
How can I see the SQL generated by Sequelize.js?
...I need to check if they are correct. In particular, I am interested in the table creation commands.
4 Answers
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Count immediate child div elements using jQuery
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I was just wondering on Friday how to count table columns with jQuery. I'll have to try a similar approach: $('#table > th').size().
– Jim Schubert
Dec 20 '09 at 22:16
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