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C++ new int[0] — will it allocate memory?
...ap guards before and after the zone given by the allocator, insertion into freelists or other complex horrible structures. Freeing it means doing the backward bookkeeping.
– v.oddou
Jun 13 '14 at 12:18
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Split a string by a delimiter in python
...on). I think the question (and answers) are more useful this way, but feel free to rollback all the edits if you disagree.
– Aran-Fey
Oct 9 '18 at 14:55
add a comment
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Initialize class fields in constructor or at declaration?
... contain a chained call to the parent constructor. A language compiler is free to include as much or as little code before that as it likes, provided that the parent constructor is called exactly once on all code paths, and limited use is made of the object under construction prior to that call. O...
What do parentheses surrounding an object/function/class declaration mean? [duplicate]
...d recommend putting a ; before the opening parenthesis: I write semi-colon free code and lines starting with a ( may be parsed as expression continued from the previous line.
– user166390
Oct 17 '10 at 20:36
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MySQL “Group By” and “Order By”
...olumn not named in the GROUP BY are the same for each group. The server is free to choose any value from each group, so unless they are the same, the values chosen are indeterminate."
As of 5.7.5 ONLY_FULL_GROUP_BY is enabled by default so non-aggregate columns cause query errors (ER_WRONG_FIELD_WIT...
Insert picture/table in R Markdown [closed]
...I can do everything I need with one of ImageMagick, GIMP, or InkScape, all free and open source.
To add a picture, use:
I know pandoc supports PNG and JPG, which should meet most of your needs.
You do have control over image size if you are creati...
Determine if a function exists in bash
...obvious answer.
Edit: Below, the -f option is superfluous with BASH, feel free to leave it out. Personally, I have trouble remembering which option does which, so I just use both. -f shows functions, and -F shows function names.
#!/bin/sh
function_exists() {
declare -f -F $1 > /dev/null
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Create a GUID in Java
...ators for random-based and name-based UUIDs, compliant with RFC-4122. Feel free to use and share.
RANDOM-BASED (v4)
This utility class that generates random-based UUIDs:
package your.package.name;
import java.security.SecureRandom;
import java.util.Random;
import java.util.UUID;
/**
* Utility cla...
How to use ConcurrentLinkedQueue?
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The ConcurentLinkedQueue is a very efficient wait/lock free implementation (see the javadoc for reference), so not only you don't need to synchronize, but the queue will not lock anything, thus being virtually as fast as a non synchronized (not thread safe) one.
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Why Java needs Serializable interface?
...things serializable" agenda in mind. Its an example of some one wanting to free whell and not heed the security and design lessons that have already been learned in the past.
– gbtimmon
Jul 9 '12 at 17:30
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