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How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
50 Answers
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how to concatenate two dictionaries to create a new one in Python? [duplicate]
...e resulting list:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9}; d3={10:8,13:22}' \
'd4 = dict(d1.items() + d2.items() + d3.items())'
100000 loops, best of 3: 4.93 usec per loop
Fastest: exploit the dict constructor to the hilt, then one update:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9};...
javac : command not found
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edited Nov 28 '17 at 12:26
JulianHarty
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answered ...
How to sleep for five seconds in a batch file/cmd [duplicate]
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858
One hack is to (mis)use the ping command:
ping 127.0.0.1 -n 6 > nul
Explanation:
ping ...
Make page to tell browser not to cache/preserve input values
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answered Apr 23 '10 at 14:38
DisgruntledGoatDisgruntledGoat
59.9k6060 gold badges185185 silver badges278278 bronze badges
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How to undo a git merge with conflicts
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1386
Latest Git:
git merge --abort
This attempts to reset your working copy to whatever state it ...
error: command 'gcc' failed with exit status 1 while installing eventlet
...nton McKinney
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answered Jun 19 '12 at 5:15
TrevorTrevor
8,80622 gold badges...
Linux find file names with given string
... ] would be a bit better.
– Joe
Oct 8 '15 at 8:58
@Joe Ah, right. You mean in case a path has spaces? But here we only...
Should I use encoding declaration in Python 3?
Python 3 uses UTF-8 encoding for source-code files by default. Should I still use the encoding declaration at the beginning of every source file? Like # -*- coding: utf-8 -*-
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Best practices for circular shift (rotate) operations in C++
...tate question with some more details about what asm gcc/clang produce for x86.
The most compiler-friendly way to express a rotate in C and C++ that avoids any Undefined Behaviour seems to be John Regehr's implementation. I've adapted it to rotate by the width of the type (using fixed-width types l...