大约有 19,000 项符合查询结果（耗时：0.0301秒） [XML]
Create singleton using GCD's dispatch_once in Objective-C
...(instancetype)sharedInstance
{
static dispatch_once_t once;
static id sharedInstance;
dispatch_once(&once, ^
{
sharedInstance = [self new];
});
return sharedInstance;
}
+ (Class*)sharedInstance
{
static dispatch_once_t once;
static Class *sharedInst...
How to show a dialog to confirm that the user wishes to exit an Android Activity?
...
In Android 2.0+ this would look like:
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Closing Activity")
.setMessage("Are you ...
Django - limiting query results
...dler(logging.StreamHandler())
In [23]: User.objects.all().order_by('-id')[:10]
(0.000) SELECT "auth_user"."id", "auth_user"."username", "auth_user"."first_name", "auth_user"."last_name", "auth_user"."email", "auth_user"."password", "auth_user"."is_staff", "auth_user"."is_active", "au...
How to reshape data from long to wide format
...
Using reshape function:
reshape(dat1, idvar = "name", timevar = "numbers", direction = "wide")
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How do I assert my exception message with JUnit Test annotation?
...a way to do so with JUnit @Test annotation? AFAIK, JUnit 4.7 doesn't provide this feature but does any future versions provide it? I know in .NET you can assert the message and the exception class. Looking for similar feature in the Java world.
...
Navigation in django
...ad>
<body>
...
{% block nav %}
<ul id="nav">
<li>{% block nav-home %}<a href="{% url home %}">Home</a>{% endblock %}</li>
<li>{% block nav-about %}<a href="{% url about %}">About</a>{% endblo...
Turn off textarea resizing
... the textarea HTML is ):
textarea[name=foo] {
resize: none;
}
Or by id (where the textarea HTML is ):
#foo {
resize: none;
}
Taken from:
http://www.electrictoolbox.com/disable-textarea-resizing-safari-chrome/
s...
Recommendations of Python REST (web services) framework? [closed]
...mendations of different Python-based REST frameworks for use on the serverside to write your own RESTful APIs? Preferably with pros and cons.
...
What are the main disadvantages of Java Server Faces 2.0?
...tly, apart from the relative steep learning curve when you don't have a solid background knowledge about basic Web Development (HTML/CSS/JS, server side versus client side, etc) and the basic Java Servlet API (request/response/session, forwarding/redirecting, etc), no serious disadvantages comes to ...
Code for a simple JavaScript countdown timer?
...n a paragraph (or anywhere else on the page), just put the line:
<span id="timer"></span>
where you want the seconds to appear. Then insert the following line in your timer() function, so it looks like this:
function timer()
{
count=count-1;
if (count <= 0)
{
clearInter...