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Zero-pad digits in string
...Rudolph
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Test for existence of nested JavaScript object key
... value of nested properties, otherwise will return undefined.
UPDATE 2019-10-17:
The optional chaining proposal reached Stage 3 on the ECMAScript committee process, this will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const valu...
Importing a CSV file into a sqlite3 database table using Python
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answered May 22 '10 at 12:20
mechanical_meatmechanical_meat
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Best way to allow plugins for a PHP application
...lobserver.php
– John Carter
Feb 25 '10 at 14:47
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Cannot delete or update a parent row: a foreign key constraint fails
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110
As is, you must delete the row out of the advertisers table before you can delete the row in th...
How do I add a linker or compile flag in a CMake file?
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10
Oh, target_link_libraries I've missed that part of doc: "Specify libraries or flags to use when linking a given target.". Thanks.
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Is there a REAL performance difference between INT and VARCHAR primary keys?
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How to check if a file exists in Go?
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answered Sep 21 '12 at 9:10
user11617user11617
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How can I join elements of an array in Bash?
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A 100% pure Bash function that supports multi-character delimiters is:
function join_by { local d=$1; shift; local f=$1; shift; printf %s "$f" "${@/#/$d}"; }
For example,
join_by , a b c #a,b,c
join_by ' , ' a b c #a , b , c
j...
Dictionary vs Object - which is more efficient and why?
... __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_obj.py:
class Obj(object):
def __init__(self, i):
self.i = i
self.l = []
all = {}
for i in range(1000000):
all[i] = Obj(i)
test_dict.py:
all = {}
for i in range(1000000):
o = {...