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Check if value already exists within list of dictionaries?
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273
Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
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Persistent invalid graphics state error when using ggplot2
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357
I ran into this same error and solved it by running:
dev.off()
and then running the plot a...
HTML5 doctype putting IE9 into quirks mode?
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134
Placing:
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
in the <hea...
How do you programmatically set an attribute?
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edited Apr 1 '18 at 23:06
Isaac
15.3k33 gold badges5353 silver badges7878 bronze badges
answered No...
How to add multiple columns to a table in Postgres?
...o I add multiple columns in one query statement in PostgreSQL using pgadmin3?
2 Answers
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MySQL: @variable vs. variable. What's the difference?
...2 @var2
--- ---
2 2
CALL prc_test();
var2 @var2
--- ---
2 3
CALL prc_test();
var2 @var2
--- ---
2 4
As you can see, var2 (procedure variable) is reinitialized each time the procedure is called, while @var2 (session-specific variable) is not.
(In addition to user-defined v...
Flask-SQLalchemy update a row's information
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213
Retrieve an object using the tutorial shown in the Flask-SQLAlchemy documentation. Once you have...
Comparing Haskell's Snap and Yesod web frameworks
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237
Full disclosure: I'm one of the lead developers of Snap.
First of all, let's talk about what S...
npm: disable postinstall script for package
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273
It's not possible to disable only postinstall scripts. However, you can disable all scripts usin...
Appropriate hashbang for Node.js scripts
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Feb 21 '15 at 14:09
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