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Center image in div horizontally [duplicate]
.../* for the img inside your div */
display: block;
margin: 0 auto;
That's all.
Note, that you'll also have to set an initial min-width for your outer div.
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Why is using a wild card with a Java import statement bad?
...tion can be solved by modern IDEs (hiding imports, refactoring class name, etc...).
– assylias
Feb 5 '13 at 8:10
15
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OOP vs Functional Programming vs Procedural [closed]
...ges were pretty small and easily replicated - C, C++, Assembler, ML, LISP, etc.. came with the basics, but tended to chicken out when it came to standardizing on things like network communications, encryption, graphics, data file formats (including XML), even basic data structures like balanced tree...
How to validate a url in Python? (Malformed or not)
...
Actually, I think this is the best way.
from django.core.validators import URLValidator
from django.core.exceptions import ValidationError
val = URLValidator(verify_exists=False)
try:
val('http://www.google.com')
except Val...
Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...will be lost. I.e. if t2 and t3 throws exception, only t2 will be catched; etc. The subsequent tasks exceptions will go unobserved.
Where as in the WhenAll - if any or all of the tasks fault, the resulting task will contain all of the exceptions. The await keyword still always re-throws the first ...
Why is it a bad practice to return generated HTML instead of JSON? Or is it?
...cus which is what happens when you keep switching from js to PHP / JAVA / etc.
Generally, I think most people prefer to do as much as possible on the server side because they don't master js, so they try to avoid it as much as possible.
Basically, I have the same opinion as those guys that are wo...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
... In Java 8, returning Optional<T> (called Maybe<T>, etc. in other languages) is an option as well. This clearly indicates to the caller that returning nothing is a possibility, and won't compile if the caller hasn't handled that possibility, as opposed to null, which (in Java ...
When to use a Content Provider
...e access to a singleton instance (the ContentResolver) to perform queries, etc. Of course you could implement your own Loader to use for your SQLite database... of course you could implement access to a single database instance across the entire application... and of course a ContentProvider isn't r...
Alias with variable in bash [duplicate]
...or that, rather than alias, and then exported it, like this:
function tail_ls { ls -l "$1" | tail; }
export -f tail_ls
Note -f switch to export: it tells it that you are exporting a function. Put this in your .bashrc and you are good to go.
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Jackson and generic type reference
...erasure: T is just a type variable, and you must indicate actual class, usually as Class argument. Without such information, best that can be done is to use bounds; and plain T is roughly same as 'T extends Object'. And Jackson will then bind JSON Objects as Maps.
In this case, tester method needs ...