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What are file descriptors, explained in simple terms?
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In simple words, when you open a file, the operating system creates an entry to represent that file and store the information about that opened file. So if there are 100 files opened in your OS then there will be 100 entries in OS (some...
What REALLY happens when you don't free after malloc?
This has been something that has bothered me for ages now.
17 Answers
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Java: difference between strong/soft/weak/phantom reference
...e Object. This kind of reference makes the referenced object not eligible for GC. That is, whenever an object is referenced by a chain of strong Reference Objects, it cannot be garbage collected.
Weak Reference Object
WeakReference<StringBuilder> weakBuilder = new WeakReference<StringBuil...
In what order do static/instance initializer blocks in Java run?
...ns several classes, each of which has a static initializer block. In what order do those blocks run? I know that within a class, such blocks are run in the order they appear in the code. I've read that it's the same across classes, but some sample code I wrote disagrees with that. I used this co...
CATALINA_OPTS vs JAVA_OPTS - What is the difference?
...OPTS - which are both used in the catalina.sh startup and shutdown script for Tomcat. They are described in comments within that file as:
[JAVA_OPTS]: (optional) Java runtime options used when the "start", "stop" or "run"
command is executed
and
[CATALINA_OPTS]: (optional) Java runtime ...
Chrome Dev Tools - “Size” vs “Content”
When viewing information about stylesheets in the Network tab of Chrome's dev tools, one column specifies both "size" and "content":
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Error in exception handler. - Laravel
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The safer option would be to change the group of the storage directories to your web servers group (usually apache or www-data, but this can vary between the different operating systems) and keep the permissions as of the directory as 775.
chgrp -R www-data app/storage
Or with...
running Rails console in production
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if you're running rails 3.0 or greater, you can also use
rails console production
production can of course be substituted with development or test (value is development by default)
Adding the option --sandbox makes it so that any changes you make t...
PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
...y question, I'm thinking if it is better using one database with X schemas or vice versa.
5 Answers
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How to create the perfect OOP application [closed]
Recently I was trying for a company ‘x’. They sent me some set of questions and told me to solve only one.
12 Answers
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