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Echo tab characters in bash script
...
From the bash man page:
Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard.
So you can do this:
echo $'hello\tworld'
...
Find index of last occurrence of a sub-string using T-SQL
...fficient.
DECLARE @FilePath VARCHAR(50) = 'My\Super\Long\String\With\Long\Words'
DECLARE @FindChar VARCHAR(1) = '\'
-- Shows text before last slash
SELECT LEFT(@FilePath, LEN(@FilePath) - CHARINDEX(@FindChar,REVERSE(@FilePath))) AS Before
-- Shows text after last slash
SELECT RIGHT(@FilePath, CHAR...
How to recover stashed uncommitted changes
... it then drops the stash since it was successfully applied.)
Some final words about --index (what the heck is it?)
What the --index does is simple to explain, but a bit complicated internally:
When you have changes, you have to git add (or "stage") them before commiting.
Thus, when you ran git...
How to check whether a string contains a substring in Ruby
... with sentences with spaces inside because #include splits the sentence in words and then uses the words as separate array values. This works perfectly for sentences. +1
– luissimo
Jan 25 '19 at 15:11
...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...e strings into fields,
people tend to describe both using the same English word, "split".
When asked to read code such as fields = line.split()
or fields = line.split(','),
people tend to correctly interpret the statements
as "splits a line into fields".
Microsoft Excel's text-to-columns tool mad...
gcc makefile error: “No rule to make target …”
... No rule to make target 'X' when X is simply missing. What a bad wording that will survive the centuries because everybody gets used to it.
– Enrico
Aug 11 at 8:43
a...
START_STICKY and START_NOT_STICKY
...ce, while you obviously referring to process killed. So you better use the word process in your answer.
– Ilya Gazman
Dec 1 '16 at 0:41
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How do API Keys and Secret Keys work? Would it be secure if I have to pass my API and secret keys to
...asically the same thing as
asking me for my credit card numbers
or password and storing that in their
own database?
Yes, though the damage someone can do with S3 seems to be limited to draining your account.
How secret do they need to be? Are
these applications that use the secret
ke...
How to use a variable inside a regular expression?
...t is very well explained here:
In short:
Let's say instead of finding a word boundary \b after TEXTO you want to match the string \boundary. The you have to write:
TEXTO = "Var"
subject = r"Var\boundary"
if re.search(rf"\b(?=\w){TEXTO}\\boundary(?!\w)", subject, re.IGNORECASE):
print("match...
Appending the same string to a list of strings in Python
...e goes here
'''
the n-1 bit code, with 0 prepended to each word, followed by
the n-1 bit code in reverse order, with 1 prepended to each word.
'''
def graycode(n):
if n==1:
return ['0','1']
else:
nbit=map(lambda x:'0'+x,gra...