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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,...
Git: updating remote branch information
...t remote update --prune
Should refresh all remotes' branches, adding new ones and deleting removed ones.
Edit:
The remote update command basically fetches the list of branches on the remote.
The --prune option will get rid of your local remote tracking branches that point to branches that no lon...
What does SQL clause “GROUP BY 1” mean?
Someone sent me a SQL query where the GROUP BY clause consisted of the statement: GROUP BY 1 .
6 Answers
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Why git can't do hard/soft resets by path?
...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 for a path is what git reset -- <path> does.
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Expansion of variables inside single quotes in a command in Bash
...fter'
'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, depending on the situation) don't isolate words. They are only used to disable interpretation of...
Is it possible to pass a flag to Gulp to have it run tasks in different ways?
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Gulp doesn't offer any kind of util for that, but you can use one of the many command args parsers. I like yargs. Should be:
var argv = require('yargs').argv;
gulp.task('my-task', function() {
return gulp.src(argv.a == 1 ? options.SCSS_SOURCE : options.OTHER_SOURCE)
.pipe(...
What's the valid way to include an image with no src?
... This is causing a broken image icon to display for me. Anyone else seeing this? I'm using the latest Firefox(27).
– dmikester1
Feb 11 '14 at 20:00
10
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Can modules have properties the same way that objects can?
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Did anybody else try this? When I put this code in one file x.py and import it from another, then calling x.y results in AttributeError: 'NoneType' object has no attribute 'c', since _M somehow has value None...
– Stephan202
May 19 '09 a...
When to use NSInteger vs. int
...y require them.
NSInteger/NSUInteger are defined as *dynamic typedef*s to one of these types, and they are defined like this:
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
typedef unsigned long NSUInteger;
#else
typedef int...
Python in Xcode 4+?
How does one create a Python friendly environment in Xcode 4, 5, 6 or 7?
8 Answers
8
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