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TypeError: 'dict_keys' object does not support indexing
...on3.x, d.keys() returns a dict_keys object which behaves a lot more like a set than a list. As such, it can't be indexed.
The solution is to pass list(d.keys()) (or simply list(d)) to shuffle.
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Set margins in a LinearLayout programmatically
...ittle code to accomplish it:
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(30...
How to access and test an internal (non-exports) function in a node.js module?
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The trick is to set the NODE_ENV environment variable to something like test and then conditionally export it.
Assuming you've not globally installed mocha, you could have a Makefile in the root of your app directory that contains the follo...
Add Foreign Key to existing table
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I had to run "SET FOREIGN_KEY_CHECKS=0;" before running the ADD CONSTRAINT command or SQL would complain "Cannot add or update a child row: a foreign key constraint fails".
– Erin Geyer
Mar 8 '17 at 1...
Heroku NodeJS http to https ssl forced redirect
...er 2014, using Heroku Cedar stack, and ExpressJS ~3.4.4, here is a working set of code.
The main thing to remember here is that we ARE deploying to Heroku. SSL termination happens at the load balancer, before encrypted traffic reaches your node app. It is possible to test whether https was used to...
Disable assertions in Python
...dulo by zero
For the environment
You can use an environment variable to set this flag as well.
This will affect every process that uses or inherits the environment.
E.g., in Windows, setting and then clearing the environment variable:
C:\>python -c "assert False"
Traceback (most recent call...
Conditional formatting based on another cell's value
...ort.google.com/drive/answer/78413#formulas
In your case, you will need to set conditional formatting on B5.
Use the "Custom formula is" option and set it to =B5>0.8*C5.
set the "Range" option to B5.
set the desired color
You can repeat this process to add more colors for the background or t...
What is the HTML tabindex attribute?
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tabindex is a global attribute responsible for two things:
it sets the order of "focusable" elements and
it makes elements "focusable".
In my mind the second thing is even more important than the first one. There are very few elements that are focusable by default (e.g. <a> and ...
Javascript : Send JSON Object with Ajax?
.../ new HttpRequest instance
xmlhttp.open("POST", "/json-handler");
xmlhttp.setRequestHeader("Content-Type", "application/json");
xmlhttp.send(JSON.stringify({name:"John Rambo", time:"2pm"}));
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.prop('checked',false) or .removeAttr('checked')?
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jQuery 3
As of jQuery 3, removeAttr does not set the corresponding property to false anymore:
Prior to jQuery 3.0, using .removeAttr() on a boolean attribute such as checked, selected, or readonly would also set the corresponding named property to false. This behavior ...