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What is a “cache-friendly” code?
... cost. The idea is that most of the executing code will be hitting a small set of variables often, and the rest (a much larger set of variables) infrequently. If the processor can't find the data in L1 cache, then it looks in L2 cache. If not there, then L3 cache, and if not there, main memory. Each...
What does O(log n) mean exactly?
...name is alphabetically, and in every section you only need to explore a subset of each section before you eventually find someone's phone number.
Of course, a bigger phone book will still take you a longer time, but it won't grow as quickly as the proportional increase in the additional size.
We...
round up to 2 decimal places in java? [duplicate]
...
BigDecimal a = new BigDecimal("123.13698");
BigDecimal roundOff = a.setScale(2, BigDecimal.ROUND_HALF_EVEN);
System.out.println(roundOff);
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Check if directory mounted with bash
...ing the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:
if mount | grep /mnt/md0 > /dev/null; then
echo "yay"
else
echo "nay"
fi
In my example, the if-statement is checking the exit...
Preferred Github workflow for updating a pull request after code review
...istory); my idea'd be to just backup the latest commit SHA that is being reset/rewritten and refer it in a comment on the PR, after the forced-push has been performed. IF prune doesn't remove that detached commit then its history will still be matching PR's comments.
– Kamafeat...
How can I convert a comma-separated string to an array?
... Please note that parseInt() tries to guess the base unless you explicit set it, which can cause unexpected results when dealing with leading zeros ("001,002,003..."). Compare parseInt('010') with parseInt('010', 10).
– Álvaro González
Dec 14 '10 at 16:04
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Check if table exists and if it doesn't exist, create it in SQL Server 2008
...d and which do not. This is extremely valuable and for scripts that run to setup and update an operational database when there are multiple of the same database running on the same instance, this is the key! Great information.
– Nelda.techspiress
Dec 29 '17 at ...
How to export and import a .sql file from command line with options? [duplicate]
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And How can we set constraints like enable/disable foreign key check or export only table structure with mysqldump
– AZinkey
Feb 28 '15 at 2:48
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Regular vs Context Free Grammars
...erminals and non-terminals. Hence you can see that regular grammar is a subset of context-free grammar.
So for a palindrome for instance, is of the form,
S->ABA
A->something
B->something
You can clearly see that palindromes cannot be expressed in regular grammar since it needs to be ei...
When tracing out variables in the console, How to create a new line?
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