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How to get UTF-8 working in Java webapps?
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I would still prefer UTF-8 above Greek (and convert your current Greek data to UTF-8) so that your application is ready for world domination.
– BalusC
Dec 4 '09 at 14:34
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SQL statement to select all rows from previous day
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To get the "today" value in SQL:
convert(date, GETDATE())
To get "yesterday":
DATEADD(day, -1, convert(date, GETDATE()))
To get "today minus X days": change the -1 into -X.
So for all yesterday's rows, you get:
select * from tablename
where date &g...
Create a hexadecimal colour based on a string with JavaScript
....toUpperCase();
return "00000".substring(0, 6 - c.length) + c;
}
To convert you would do:
intToRGB(hashCode(your_string))
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Checking if a variable is an integer
...) rescue false This will not work for "1" if you want to check if it will convert
– mc.
Feb 18 '14 at 18:15
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Downloading a large file using curl
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You can use this function, which creates a tempfile in the filesystem and returns the path to the downloaded file if everything worked fine:
function getFileContents($url)
{
// Workaround: Save temp file
$img = tempnam(sys_get_temp_dir(), 'pdf-');
$img .= '.' . pathinfo($url...
Unique fields that allow nulls in Django
... return value
if value is None:
# If db has NULL, convert it to ''.
return ''
# Otherwise, just return the value.
return value
def get_prep_value(self, value):
"""
Catches value right before sending to db.
"""
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What is the difference between Serialization and Marshaling?
...ats remote objects specially. (RFC 2713)
To "serialize" an object means to convert its state into a byte stream in such a way that the byte stream can be converted back into a copy of the object.
So, marshalling also saves the codebase of an object in the byte stream in addition to its state.
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Rails: fields_for with index?
...e = "#{object_name}[#{association_name}_attributes]"
association = convert_to_model(association)
if association.respond_to?(:persisted?)
association = [association] if @object.send(association_name).is_a?(Array)
elsif !association.respond_to?(:to_ary)
ass...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...e queries are really fast, but it's the round trips that wreak havok. I've converted "WHERE Id = const" to "WHERE Id IN (const, const, ...)" and gotten orders of magnitude increases out of it.
– Hans
Oct 2 '12 at 23:07
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PHP expresses two different strings to be the same [duplicate]
...string or the comparison involves
numerical strings, then each string is converted to a number and the
comparison performed numerically.
http://php.net/manual/en/language.operators.comparison.php
Attention:
What about the behavior in javascript which also has both == and ===?
The answer is ...