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What are the differences between Perl, Python, AWK and sed? [closed]
...ges of lines) of the input file or files. Its language is based on ed, the Unix editor, and although it has conditionals and so on, it is hard to work with for complex tasks. You can work minor miracles with it - but at a cost to the hair on your head. However, it is probably the fastest of the prog...
Text editor to open big (giant, huge, large) text files [closed]
...rams (no installation required):
less (macOS, Linux) – The traditional Unix command-line pager tool. Lets you view text files of practically any size. Can be installed on Windows, too.
Notepad (Windows) – Decent with large files, especially with word wrap turned off.
MORE (Windows) – This re...
Getting “unixtime” in Java
Date.getTime() returns milliseconds since Jan 1, 1970. Unixtime is seconds since Jan 1, 1970. I don't usually code in java, but I'm working on some bug fixes. I have:
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What is the difference between a directory and a folder?
...omputer. The distinction can be due to the way a directory is accessed; on Unix systems, /usr/bin/ is usually referred to as a directory when viewed in a command line console, but if accessed through a graphical file manager, users may sometimes call it a folder.
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How can I pretty-print JSON in a shell script?
Is there a (Unix) shell script to format JSON in human-readable form?
55 Answers
55
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Where did the name `atoi` come from?
...icial source on it... but in this listing of man pages from Third Edition Unix (1973) collected by Dennis Ritchie himself, it does contain the line:
atoi(III): convert ASCII to integer
In fact, even the first edition Unix (ca 1971) man pages list atoi as meaning Ascii to Integer.
So even if...
Should I choose ActivePerl or Strawberry Perl for Windows? [duplicate]
...reated for Windows and so some CPAN modules will not work (because they do Unix-specific things).
I have used both before and it seemed to work for most cases. But I lean towards Strawberry Perl because the environment is closer to Unix and so there are not many incompatibilities. On the other hand...
Difference between sh and bash
...descendant of the Korn shell. FreeBSD's sh is a descendant of the original UNIX Bourne shell. Solaris has its own sh which for a long time was not POSIX-compliant; a free implementation is available from the Heirloom project.
How can you find out what /bin/sh points to on your system?
The compli...
How do you get a timestamp in JavaScript?
... be sure I always use the seconds, not milliseconds.
This will give you a Unix timestamp (in seconds):
var unix = Math.round(+new Date()/1000);
This will give you the milliseconds since the epoch (not Unix timestamp):
var milliseconds = new Date().getTime();
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Linux: copy and create destination dir if it does not exist
...ctory.
Note that $_ is not part of the POSIX standard, so theoretically a Unix variant might have a shell that doesn't support this construct. However, I don't know of any modern shells that don't support $_; certainly Bash, Dash, and zsh all do.
A final note: the command I've given at the start...