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Check if value already exists within list of dictionaries?
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Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
The part in parentheses is a generator expression that returns True for each dictionary that has the key-value pair you are looking for, otherwise False.
If the key could also...
Why git can't do hard/soft resets by path?
...ommands provide that functionality already), and it reduces the potential for doing the wrong thing by accident.
A "hard reset" for a path is just done with git checkout HEAD -- <path> (checking out the existing version of the file).
A soft reset for a path doesn't make sense.
A mixed reset...
Expansion of variables inside single quotes in a command in Bash
... have to close the quotes, insert something, and then re-enter again.
'before'"$variable"'after'
'before'"'"'after'
'before'\''after'
Word concatenation is simply done by juxtaposition. As you can verify, each of the above lines is a single word to the shell. Quotes (single or double quotes, depe...
Why do I get a “Null value was assigned to a property of primitive type setter of” error message whe
I get the following error when using a primitive attribute in my grails domain object:
12 Answers
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Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
... that finds all the URLs within an html file and repeats the same process for each html content linked to the discovered URLs. The function is recursive and can go on endlessly. However, I have put a limit on the recursion by setting a global variable which causes the recursion to stop after 100 rec...
How to add elements of a Java8 stream into an existing List
Javadoc of Collector shows how to collect elements of a stream into a new List. Is there an one-liner that adds the results into an existing ArrayList?
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Get type of a generic parameter in Java with reflection
...uments()[0];
So there seems to be some reflection-magic around that I unfortunetly don't fully understand... Sorry.
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jQuery Validate - Enable validation for hidden fields
...of jQuery validation plugin 1.9 by default validation of hidden fields ignored . I'm using CKEditor for textarea input field and it hides the field and replace it with iframe. The field is there, but validation disabled for hidden fields. With validation plugin version 1.8.1 everything works as exp...
Suppress/ print without b' prefix for bytes in Python 3
Just posting this so I can search for it later, as it always seems to stump me:
4 Answers
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Android adding simple animations while setvisibility(view.Gone)
...w click event and I don't know how to use it.
Did my xml design looks good or not?
Any suggestions would be appreciated.
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