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Get lengths of a list in a jinja2 template
...u can also use this syntax in expressions like
{% if products|length > 1 %}
jinja2's builtin filters are documented here; and specifically, as you've already found, length (and its synonym count) is documented to:
Return the number of items of a sequence or mapping.
So, again as you've f...
How to check whether an object has certain method/property?
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edited Mar 15 '11 at 5:40
Fraser
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Optimise PostgreSQL for fast testing
...ion of slightly altering the DDL, you can also use UNLOGGED tables in Pg 9.1+ to completely avoid WAL logging and gain a real speed boost at the cost of the tables getting erased if the server crashes. There is no configuration option to make all tables unlogged, it must be set during CREATE TABLE. ...
How do I convert struct System.Byte byte[] to a System.IO.Stream object in C#?
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The easiest way to convert a byte array to a stream is using the MemoryStream class:
Stream ...
Delete sql rows where IDs do not have a match from another table
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edited Aug 12 '11 at 11:57
Abel
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How to write to a JSON file in the correct format
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179
Require the JSON library, and use to_json.
require 'json'
tempHash = {
"key_a" => "val...
How to inspect the return value of a function in GDB?
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121
I imagine there are better ways to do it, but the finish command executes until the current st...
Using “like” wildcard in prepared statement
... "SELECT * FROM analysis WHERE notes LIKE ? ESCAPE '!'");
pstmt.setString(1, notes + "%");
or a suffix-match:
pstmt.setString(1, "%" + notes);
or a global match:
pstmt.setString(1, "%" + notes + "%");
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How to get the host name of the current machine as defined in the Ansible hosts file?
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edited Jan 14 '19 at 9:23
Richlv
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setting multiple column using one update
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Just add parameters, split by comma:
UPDATE tablename SET column1 = "value1", column2 = "value2" ....
See also: mySQL manual on UPDATE
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