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How to sort an array of hashes in ruby
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Simples:
array_of_hashes.sort_by { |hsh| hsh[:zip] }
Note:
When using sort_by you need to assign the result to a new variable: array_of_hashes = array_of_hashes.sort_by{} otherwise you can use the "bang" method to modify in place: array_of_hashes.sort_by!{}
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Pairs from single list
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My favorite way to do it:
from itertools import izip
def pairwise(t):
it = iter(t)
return izip(it,it)
# for "pairs" of any length
def chunkwise(t, size=2):
it = iter(t)
return izip(*[it]*size)
When you want to pair all elements you obviously might need a...
Reverse engineering from an APK file to a project
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@sri just rename the apk file to zip and extract it, you will have the resource files in res folder
– Hoang Huynh
Nov 5 '13 at 3:58
8
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Element-wise addition of 2 lists?
...ator import add
>>> list( map(add, list1, list2) )
[5, 7, 9]
or zip with a list comprehension:
>>> [sum(x) for x in zip(list1, list2)]
[5, 7, 9]
Timing comparisons:
>>> list2 = [4, 5, 6]*10**5
>>> list1 = [1, 2, 3]*10**5
>>> %timeit from operator im...
Join strings with a delimiter only if strings are not null or empty
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Consider
var address = "foo";
var city;
var state = "bar";
var zip;
text = [address, city, state, zip].filter(Boolean).join(", ");
console.log(text)
.filter(Boolean) (which is the same as .filter(x => x)) removes all "falsy" values (nulls, undefineds, empty strings etc). If...
regex for zip-code
I need Regex which can satisfy all my three condtions for zip-code. E.g-
3 Answers
3...
Split string every nth character?
...on top. One could even write '.'*n to make it more clear. No joining, no zipping, no loops, no list comprehension; just find the next two characters next to each other, which is exactly how a human brain thinks about it. If Monty Python were still alive, he'd love this method!
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Extract directory from path
...f the file I am working with. For example, the file = "stuff/backup/file.zip" . I need a way to get the string " stuff/backup/ " from the variable $file .
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How to convert AAR to JAR
...consists of a JAR file and some resource files (it is basically a standard zip file with a custom file extension). Here are the steps to convert:
Extract the AAR file using standard zip extract (rename it to *.zip to make it easier)
Find the classes.jar file in the extracted files
Rename it as you...
How to download .zip from GitHub for a particular commit sha?
I want to download a .zip with the source of a library hosted on github, but I don't want the master, because every time I download I could be downloading a different version.
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