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Swift: Testing optionals for nil
... the pyramid of doom when working with multiple optional values.
In other words, your options now include explicitly checking for nil:
if xyz != nil {
// Do something with xyz
}
Optional binding:
if let xyz = xyz {
// Do something with xyz
// (Note that we can reuse the same variabl...
Merge (with squash) all changes from another branch as a single commit
...
A word of caution: this works, but the default commit message includes the log from the branch being merged. The problem is it looks similar to the format you normally see where the entire text shown does not actually become pa...
How to compare files from two different branches?
...it diff A...B is equivalent to git diff $(git-merge-base A B) B.
In other words, this will give a diff of changes in master since it diverged from mybranch (but without new changes since then in mybranch).
In all cases, the -- separator before the file name indicates the end of command line flags....
Calculating a directory's size using Python?
... the du command in order to confine the search to the filesystem. In other words, use ['du', '-shx', path] instead.
– Keith Hanlan
Sep 27 '17 at 20:35
add a comment
...
How does #include work in C++? [duplicate]
...th compile-time and program size unnecessarily. [edit: as pointed out by @Swordfish in the comments that the output program size remains unaffected. But still, it's good practice to include only the libraries you actually need, unless it's some competitive competition]
But in contests, using this f...
Export a stash to another computer
...don't technically have to apply the stash to a new commit object. In other words, creating a new branch isn't necessary. However, pushing a stash directly to a remote is tricky to say the least.
– Tyler Crompton
Jul 31 '17 at 8:48
...
Parse JSON in JavaScript? [duplicate]
...your questions to the next geek meetup for a free hot topic. Free fighting words to be expected. :-Z
– Simon B.
Aug 8 '19 at 21:27
...
Python: Check if one dictionary is a subset of another larger dictionary
... values of the passed dicts are different for matching keys). Or in other words: The solution for nested dicts is not necessarily a drop-in replacement depending on the use-case.
– blubberdiblub
Aug 26 '19 at 13:13
...
Django optional url parameters
...;\w+|)
The "(a|b)" means a or b, so in your case it would be one or more word characters (\w+) or nothing.
So it would look like:
url(
r'^project_config/(?P<product>\w+)/(?P<project_id>\w+|)/$',
'tool.views.ProjectConfig',
name='project_config'
),
...
A monad is just a monoid in the category of endofunctors, what's the problem?
...this construct, has absolutely nothing to do with a monad per se. In other words, the construct does not rely on what makes a monad unique.
When trying to figure out whether to build code with a shared context to support computations that depend on each other, versus computations that can be run i...