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The model backing the context has changed since the database was created
... IDatabaseInitializer instance."
Here is what is going on and what to do about it:
When a model is first created, we run a DatabaseInitializer to do
things like create the database if it's not there or add seed data.
The default DatabaseInitializer tries to compare the database schema
...
Most efficient way to reverse a numpy array
...u re-creating the view more often than you need to? You should be able to do something like this:
arr = np.array(some_sequence)
reversed_arr = arr[::-1]
do_something(arr)
look_at(reversed_arr)
do_something_else(arr)
look_at(reversed_arr)
I'm not a numpy expert, but this seems like it would be t...
How do I list one filename per output line in Linux?
...pports -1. GNU coreutils (installed on standard Linux systems) and Solaris do; but if in doubt, use man ls or ls --help or check the documentation. E.g.:
$ man ls
...
-1 list one file per line. Avoid '\n' with -q or -b
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How do I simulate a low bandwidth, high latency environment?
... preference pane is part of the Hardware IO Tools for XCode, which you can download from developer.apple.com/downloads
– avernet
Feb 4 '13 at 19:10
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How do I redirect output to a variable in shell? [duplicate]
...
This captures the output of a command, but it does not use a redirect. If you actually need to use a redirect because of a more complex need, See my answer. Google brought you here, right? Why go somewhere else to find the answer you searched for?
–...
How do I remove duplicate items from an array in Perl?
...
You can do something like this as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three...
How do I copy items from list to list without foreach?
How do I transfer the items contained in one List to another in C# without using foreach ?
8 Answers
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How do you make sure email you send programmatically is not automatically marked as spam?
...tication methods, such as SPF, and DKIM to prove that your emails and your domain name belong together, and to prevent spoofing of your domain name. The SPF website includes a wizard to generate the DNS information for your site.
Check your reverse DNS to make sure the IP address of your mail serve...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
...ckoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt?
11 Answers
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How do you serve a file for download with AngularJS or Javascript?
...xtarea. When a button is clicked I would like to have the text offered for download as a .txt file. Is this possible using AngularJS or Javascript?
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