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add created_at and updated_at fields to mongoose schemas
Is there a way to add created_at and updated_at fields to a mongoose schema, without having to pass them in everytime new MyModel() is called?
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What's wrong with nullable columns in composite primary keys?
...key creation. If this was just a retrieval problem, you could use where pk_1 = 'a' and pk_2 = 'b' with normal values, and switch to where pk_1 is null and pk_2 = 'b' when there are nulls.
– EoghanM
Mar 15 '13 at 9:59
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How do I compare two strings in Perl?
...fied by the current locale if a legacy use locale (but not use locale ':not_characters') is in effect. See perllocale. Do not mix these with Unicode, only with legacy binary encodings. The standard Unicode::Collate and Unicode::Collate::Locale modules offer much more powerful solutions to collation ...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
...g=-d -v release install
[signjar] Executing 'C:\Program Files\Java\jdk1.7.0_03\bin\jarsigner.exe' with arguments:
[signjar] '-keystore'
[signjar] 'C:\cygwin\home\Chloe\pairfinder\release.keystore'
[signjar] '-signedjar'
[signjar] 'C:\cygwin\home\Chloe\pairfinder\bin\PairFinder-release-unaligned.apk'...
Handling a colon in an element ID in a CSS selector [duplicate]
JSF is setting the ID of an input field to search_form:expression . I need to specify some styling on that element, but that colon looks like the beginning of a pseudo-element to the browser so it gets marked invalid and ignored. Is there anyway to escape the colon or something?
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How do I use cascade delete with SQL Server?
...etting enabled.
Something like:
ALTER TABLE dbo.T2
DROP CONSTRAINT FK_T1_T2 -- or whatever it's called
ALTER TABLE dbo.T2
ADD CONSTRAINT FK_T1_T2_Cascade
FOREIGN KEY (EmployeeID) REFERENCES dbo.T1(EmployeeID) ON DELETE CASCADE
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When to use symbols instead of strings in Ruby?
...eference the symbol, saving memory. So every time the interpreter reads :my_key it can take it from memory instead of instantiate it again. This is less expensive than initializing a new string every time.
You can get a list all symbols that are already instantiated with the command Symbol.all_sym...
Calculating Distance between two Latitude and Longitude GeoCoordinates
...tic UnitOfLength Miles = new UnitOfLength(1);
private readonly double _fromMilesFactor;
private UnitOfLength(double fromMilesFactor)
{
_fromMilesFactor = fromMilesFactor;
}
public double ConvertFromMiles(double input)
{
return input*_fromMilesFactor;
}
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Saving interactive Matplotlib figures
...can even extract the data from the plots:
data = figx.axes[0].lines[0].get_data()
(It works for lines, pcolor & imshow - pcolormesh works with some tricks to reconstruct the flattened data.)
I got the excellent tip from Saving Matplotlib Figures Using Pickle.
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Eclipse hangs on loading workbench
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#
#
# error
#
# show an error message and exit
#
# params:
# 1: l_msg - the message to display
error() {
local l_msg="$1"
echo "error: $l_msg" 1>&2
exit 1
}
#
# autoinstall
#
# check that l_prog is available by calling which
# if not available install from given package de...