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TypeError: not all arguments converted during string formatting python
...The conditions are that one name is longer than the other and they need to start with 'elif' and with no indentations. If you put it within the first condition (by giving it four indentations from the margin), it ends up being contradictory because the lengths of the names cannot be equal and differ...
PostgreSQL - max number of parameters in “IN” clause?
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According to the source code located here, starting at line 850, PostgreSQL doesn't explicitly limit the number of arguments.
The following is a code comment from line 870:
/*
* We try to generate a ScalarArrayOpExpr from IN/NOT IN, but this is only
* possible if ...
How to run multiple shells on Emacs
...you use eshell: just as M-x eshell takes you back to *eshell* (rather than starting a new eshell), if you use a numeric prefix argument it will take you to that eshell buffer. For instance, C-3M-xeshell will take you to *eshell*<3>. Sadly if you use shell (rather than eshell), this trick doesn...
jasmine: Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL
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This error started out of the blue for me, on a test that had always worked. I couldn't find any suggestions that helped until I noticed my Macbook was running sluggishly. I noticed the CPU was pegged by another process, which I killed....
How to save a Python interactive session?
...ssion. Mine was looking a bit empty after calling the function only at the start.
– dolphus333
Apr 27 '16 at 22:50
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Capture iframe load complete event
...sure your load listener is always called by attaching it before the iframe starts loading.
<script>
var iframe = document.createElement('iframe');
iframe.onload = function() { alert('myframe is loaded'); }; // before setting 'src'
iframe.src = '...';
document.body.appendChild(iframe); // add...
How do I print out the contents of an object in Rails for easy debugging?
... Post.all
end
#app/view/posts/index.html.erb
<%= debug(@posts) %>
#start your server
rails -s
results (in browser)
- !ruby/object:Post
raw_attributes:
id: 2
title: My Second Post
body: Welcome! This is another example post
published_at: '2015-10-19 23:00:43.469520'
...
How to use Python's pip to download and keep the zipped files for a package?
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pip install --download is deprecated. Starting from version 8.0.0 you should use pip download command:
pip download <package-name>
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How to get a Docker container's IP address from the host
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Too bad, on one of my instances (started with docker run -it MYCONTAINER /bin/bash), the output of inspect has no section NetworkSettings!
– Eric
Oct 12 '17 at 10:16
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Core Data: Quickest way to delete all instances of an entity
...ions can be found in the "What's New in Core Data" session from WWDC 2015 (starting at ~14:10).
iOS 8 and earlier:
Fetch 'em all and delete 'em all:
NSFetchRequest *allCars = [[NSFetchRequest alloc] init];
[allCars setEntity:[NSEntityDescription entityForName:@"Car" inManagedObjectContext:myConte...