大约有 48,000 项符合查询结果（耗时：0.0559秒） [XML]
In which scenario do I use a particular STL container?
... every one of them have their own specific properties, and I'm close to memorizing all of them... But what I do not yet grasp is in which scenario each of them is used.
...
How to access java-classes in the default-package?
I'm working now together with others in a grails project. I have to write some Java-classes. But I need access to an searchable object created with groovy. It seems, that this object has to be placed in the default-package.
...
Show just the current branch in Git
I tried looking for a special Git command for this, but I couldn't find one. Is there anything shorter or faster than the following?
...
Error “initializer element is not constant” when trying to initialize variable with const
I get an error on line 6 (initialize my_foo to foo_init) of the following program and I'm not sure I understand why.
5 Answ...
What is MOJO in Maven?
I'm reading about Maven right now and everywhere in a text I see this word (mojo). I approximately understand what it means, but I would not refuse from a good explanation. I tried to google, but found only non-maven explanations.
...
bool to int conversion
How portable is this conversion. Can I be sure that both assertions pass?
4 Answers
4
...
jQuery How to Get Element's Margin and Padding?
Just wondering - how using jQuery - I can get an elements formatted total padding and margin etc ? i.e. 30px 30px 30px 30px or 30px 5px 15px 30px etc
...
How can I list ALL DNS records?
Is there any way I can list ALL DNS records for a domain?
8 Answers
8
...
Jinja2 template variable if None Object set a default value
...
Use the none builtin function (http://jinja.pocoo.org/docs/templates/#none):
{% if p is not none %}
{{ p.User['first_name'] }}
{% else %}
NONE
{%endif %}
or
{{ p.User['first_name'] if p != None else 'NONE' }}
or if you need an empty string:
{{ p.User['first...
Is there a command like “watch” or “inotifywait” on the Mac?
...swatch
fswatch is a small program using the Mac OS X FSEvents API to monitor a directory.
When an event about any change to that directory is received, the specified
shell command is executed by /bin/bash
If you're on GNU/Linux,
inotifywatch (part of the
inotify-tools package on most distributions...