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Explain the use of a bit vector for determining if all characters are unique
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int checker is used here as a storage for bits. Every bit in integer value can be treated as a flag, so eventually int is an array of bits (flag). Each bit in your code states whether the character with bit's index was found ...
Explain Morris inorder tree traversal without using stacks or recursion
Can someone please help me understand the following Morris inorder tree traversal algorithm without using stacks or recursion ? I was trying to understand how it works, but its just escaping me.
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What's the difference between [ and [[ in Bash? [duplicate]
...You no longer have to quote variables like mad because [[ handles empty strings and strings with whitespace more intuitively. For example, with [ you have to write
if [ -f "$file" ]
to correctly handle empty strings or file names with spaces in them. With [[ the quotes are unnecessary:
if [[ -f ...
Find value in an array
In Ruby, how can I find a value in an array?
10 Answers
10
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How to deploy correctly when using Composer's develop / production switch?
Composer has the option to load several dependencies only while being in development, so the tools will not be installed in production (on the live server). This is (in theory) very handy for scripts that only make sense in development, like tests, fake-data-tools, debugger, etc.
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Jump to editor shortcut in Intellij IDEA
...ee (if it was the last tool that I used), but is there a shortcut for jumping back to editor?
8 Answers
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Convert a 1D array to a 2D array in numpy
I want to convert a 1-dimensional array into a 2-dimensional array by specifying the number of columns in the 2D array. Something that would work like this:
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How to change the docker image installation directory?
From what I can tell, docker images are installed to /var/lib/docker as they are pulled. Is there a way to change this location, such as to a mounted volume like /mnt ?
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How do you round a float to two decimal places in jruby
JRuby 1.6.x. How do you round a float to decimal places in jruby.
6 Answers
6
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Most efficient way to reverse a numpy array
Believe it or not, after profiling my current code, the repetitive operation of numpy array reversion ate a giant chunk of the running time. What I have right now is the common view-based method:
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