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__getattr__ on a module
...getattr__(name: str) -> Any:
...
This will also allow hooks into "from" imports, i.e. you can return dynamically generated objects for statements such as from my_module import whatever.
On a related note, along with the module getattr you may also define a __dir__ function at module level ...
Change timestamps while rebasing git branch
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No, it's not. In fact, it's the exact opposite. From the docs of git rebase: "These flags are passed to git am to easily change the dates of the rebased commits". In git am it says: --committer-date-is-author-date "[...]allows the user to lie about the committer date by us...
NSUserDefaults - How to tell if a key exists
...ce objectForKey confuses 0 with nil, so it can't work. Tested successfully from iOS 4.3 to 10.2.1
– Chrysotribax
Mar 22 '17 at 17:38
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Concatenate a vector of strings/character
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You can use stri_paste function with collapse parameter from stringi package like this:
stri_paste(letters, collapse='')
## [1] "abcdefghijklmnopqrstuvwxyz"
And some benchmarks:
require(microbenchmark)
test <- stri_rand_lipsum(100)
microbenchmark(stri_paste(test, collapse=...
How to print a dictionary's key?
... alternative in python 3, if that is what you mean by Py3k (I've been away from python for a while now) it .items(). I added an example.
– juanchopanza
Mar 27 '13 at 22:59
1
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Is it unnecessary to put super() in constructor?
..., neither Eclipse nor IntelliJ provide any means of comfortably navigating from the constructor of the derived class to the constructor of the base class.
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What is the difference between ? and Object in Java generics?
...ap<String, Object>. Say you want to write a method that accepts maps from Strings to anything: If you would write
public void foobar(Map<String, Object> ms) {
...
}
you can't supply a HashMap<String, String>. If you write
public void foobar(Map<String, ?> ms) {
.....
When to use a “has_many :through” relation in Rails?
...role
end
This introduces a new table, and eliminates the group_id column from the user's table.
The problem with this code is that you'd have to update every where else you use the user class and change it:
user.groups.first.name
# becomes
user.group_memberships.first.group.name
This type of...
NSString with \n or line break
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I found that when I was reading strings in from a .plist file, occurrences of "\n" were parsed as "\\n". The solution for me was to replace occurrences of "\\n" with "\n". For example, given an instance of NSString named myString read in from my .plist file, I had to ...
How can I easily fixup a past commit?
... stage fixes, run git fixup ' workflow I asked for:
#!/usr/bin/env python
from subprocess import call
import sys
# Taken from http://stackoverflow.com/questions/377017/test-if-executable-exists-in python
def which(program):
import os
def is_exe(fpath):
return os.path.exists(fpath) ...