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How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ay, here's a test:
auto q = make_array(make_array(make_array(std::string("Cat1"), std::string("Dog1")), make_array(std::string("Mouse1"), std::string("Rat1"))),
make_array(make_array(std::string("Cat2"), std::string("Dog2")), make_array(std::string("Mouse2"), std::string("Rat2")...
How to read from a file or STDIN in Bash?
...
Here is the simplest way:
#!/bin/sh
cat -
Usage:
$ echo test | sh my_script.sh
test
To assign stdin to the variable, you may use: STDIN=$(cat -) or just simply STDIN=$(cat) as operator is not necessary (as per @mklement0 comment).
To parse each line fro...
How to make “if not true condition”?
I would like to have the echo command executed when cat /etc/passwd | grep "sysa" is not true.
6 Answers
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File content into unix variable with newlines
...ive the result you want. See the following transcript for a demo:
pax> cat num1.txt ; x=$(cat num1.txt)
line 1
line 2
pax> echo $x ; echo '===' ; echo "$x"
line 1 line 2
===
line 1
line 2
The reason why newlines are replaced with spaces is not entirely to do with the echo command, rather...
Python concatenate text files
...e ['file1.txt', 'file2.txt', ...] . I want to write a Python script to concatenate these files into a new file. I could open each file by f = open(...) , read line by line by calling f.readline() , and write each line into that new file. It doesn't seem very "elegant" to me, especially the part w...
Pseudo-terminal will not be allocated because stdin is not a terminal
...
Try ssh -t -t(or ssh -tt for short) to force pseudo-tty allocation even if stdin isn't a terminal.
See also: Terminating SSH session executed by bash script
From ssh manpage:
-T Disable pseudo-tty allocation.
-t Force pseudo-tty allocation. This can be used to execute a...
Linux command or script counting duplicated lines in a text file?
...e same as borribles' but if you add the d param to uniq it only shows duplicates.
sort filename | uniq -cd | sort -nr
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How to capitalize the first letter of a String in Java?
... @dutt: No actually, that was perfectly fine too. But Rekin's modification made it perfect. ;)
– Adeel Ansari
Oct 11 '10 at 8:42
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How do you create different variable names while in a loop? [duplicate]
...ou can do this is with exec(). For example:
for k in range(5):
exec(f'cat_{k} = k*2')
>>> print(cat_0)
0
>>> print(cat_1)
2
>>> print(cat_2)
4
>>> print(cat_3)
6
>>> print(cat_4)
8
Here I am taking advantage of the handy f string formatting in Py...
How can I parse a YAML file from a Linux shell script?
...n't work for all YAML, you're right. That's why I opened with a few qualifications. I just shared what worked for my use case, since it answered the question better than any other at the time. This can definitely be expanded.
– Curtis Blackwell
Nov 27 '13 at 13...