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How to replace ${} placeholders in a text file?
...!/bin/sh
#Set variables
i=1
word="dog"
#Read in template one line at the time, and replace variables (more
#natural (and efficient) way, thanks to Jonathan Leffler).
while read line
do
eval echo "$line"
done < "./template.txt"
Output:
#sh script.sh
the number is 1
the word is dog
...
Removing carriage return and new-line from the end of a string in c#
...it over my string twice - once for when '\n' was at the end and the second time for when '\r' was at the end (now that the '\n' was removed).
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Why does datetime.datetime.utcnow() not contain timezone information?
Why does this datetime not have any timezone info given that it is explicitly a UTC datetime ?
9 Answers
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How do I look inside a Python object?
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I agree with usuallyuseless. A lot of the time, a simple call to dir() will suffice, thus saving you the trouble of having to look through the source code.
– Sasha Chedygov
Jun 18 '09 at 0:13
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PHP date yesterday [duplicate]
...is only for formatting, but it accepts a second parameter.
date("F j, Y", time() - 60 * 60 * 24);
To keep it simple I just subtract 24 hours from the unix timestamp.
A modern oop-approach is using DateTime
$date = new DateTime();
$date->sub(new DateInterval('P1D'));
echo $date->format('F ...
Cast Int to enum in Java
...to cache MyEnum.values() as its expensive. i.e. if you call it hundreds of times.
– Peter Lawrey
May 4 '11 at 7:27
6
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How do I sort a dictionary by value?
...ey, d[key]) ----- -> b: 1 c: 5 a: 7 d: 3 The results change each time I run the code: weird. (sorry, can't get the code to display properly)
– bli
Aug 13 '14 at 15:58
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Is there a way to 'uniq' by column?
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This approach is two times faster than sort
– bitek
Feb 17 '15 at 21:12
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Listing all permutations of a string/integer
...t to explain it human language. I think recursion is very easy most of the times. You only have to grasp two steps:
The first step
All the other steps (all with the same logic)
In human language:
In short:
The permutation of 1 element is one element.
The permutation of a set of elements is a lis...
Contains method for a slice
...le, that's true. But what it takes to add such basic functionality into runtime? I haven't found such issues in Go repo on github. That's sad and strange.
– Igor Petrov
May 23 '17 at 6:06
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