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Remove all special characters, punctuation and spaces from string
...without regex:
>>> string = "Special $#! characters spaces 888323"
>>> ''.join(e for e in string if e.isalnum())
'Specialcharactersspaces888323'
You can use str.isalnum:
S.isalnum() -> bool
Return True if all characters in S are alphanumeric
and there is at least one cha...
Pad a number with leading zeros in JavaScript [duplicate]
...e.
Example usage:
pad(10, 4); // 0010
pad(9, 4); // 0009
pad(123, 4); // 0123
pad(10, 4, '-'); // --10
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Create Pandas DataFrame from a string
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A simple way to do this is to use StringIO.StringIO (python2) or io.StringIO (python3) and pass that to the pandas.read_csv function. E.g:
import sys
if sys.version_info[0] < 3:
from StringIO import StringIO
else:
from io import StringIO
import pandas as pd
TESTDATA = ...
How to get rspec-2 to give the full trace associated with a test failure?
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244
You must run rspec with -b option to see full backtraces
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How to get the current time as datetime
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27 Answers
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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...t's an EXAMPLE.
BEGIN;
UPDATE testtable
SET somedata = 'blah'
WHERE id = 2;
-- Remember, this is WRONG. Do NOT COPY IT.
INSERT INTO testtable (id, somedata)
SELECT 2, 'blah'
WHERE NOT EXISTS (SELECT 1 FROM testtable WHERE testtable.id = 2);
COMMIT;
then when two run at once there are several f...
In an array of objects, fastest way to find the index of an object whose attributes match a search
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answered Apr 19 '13 at 8:28
Pablo Francisco Pérez HidalgoPablo Francisco Pérez Hidalgo
23.7k77 gold badges3131 silver badges5151 bronze badges
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How to avoid warning when introducing NAs by coercion
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142
Use suppressWarnings():
suppressWarnings(as.numeric(c("1", "2", "X")))
[1] 1 2 NA
This supp...
How to extract base URL from a string in JavaScript?
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20 Answers
20
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On EC2: sudo node command not found, but node without sudo is ok
I have just installed nodejs on a new EC2 micro instance.
12 Answers
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