大约有 17,000 项符合查询结果（耗时：0.0452秒） [XML]
Javascript Shorthand for getElementById
... ID, but also getting element by class :P)
I use something like
function _(s){
if(s.charAt(0)=='#')return [document.getElementById(s.slice(1))];
else if(s.charAt(0)=='.'){
var b=[],a=document.getElementsByTagName("*");
for(i=0;i<a.length;i++)if(a[i].className.split(' ')....
AngularJS sorting by property
...'s rows in the filter e.g. for(var objectKey in input) { input[objectKey]['_key'] = objectKey; array.push(input[objectKey]); } Like that we can use <div ng-repeat="value in object | orderObjectBy:'order'" ng-init="key = value['_key']">
– Nicolas Janel
Jul...
List of tables, db schema, dump etc using the Python sqlite3 API
...
You can fetch the list of tables and schemata by querying the SQLITE_MASTER table:
sqlite> .tab
job snmptarget t1 t2 t3
sqlite> select name from sqlite_master where type = 'table';
job
t1
t2
snmptarget
t3
sqlite> .schema job
CREATE TABLE job (
...
How to Apply Gradient to background view of iOS Swift App
...rray <AnyObject> = [colorTop, colorBottom]
– JP_
Sep 9 '14 at 6:46
7
for swift 1.0 the synt...
Create list of single item repeated N times
... mutable empty list, set, or dict, you should do something like this:
list_of_lists = [[] for _ in columns]
The underscore is simply a throwaway variable name in this context.
If you only have the number, that would be:
list_of_lists = [[] for _ in range(4)]
The _ is not really special, but y...
Handling applicationDidBecomeActive - “How can a view controller respond to the app becoming Active?
...tion:
lazy var didBecomeActive: (Notification) -> Void = { [weak self] _ in
// Do stuff
}
If you require the actual notification be included, just replace the _ with notification.
Next, we set up the notification to observe for the app becoming active.
func setupObserver() {
_ = Not...
Android emulator and virtualbox cannot run at same time
...
Removing the kvm kernel modules (using 'sudo rmmod kvm_intel kvm') makes it possible to run the Virtualbox and the Android emulator at the same time but the performance of the Android emulator in such a setup is extremely bad. If possible it is better to shutdown the Virtualbox ...
What does it mean for a data structure to be “intrusive”?
...
boost.org/doc/libs/1_45_0/doc/html/intrusive.html has examples and a good description of pros and cons.
– Tony Delroy
Feb 16 '11 at 6:37
...
Where to define custom error types in Ruby and/or Rails?
...ems
I have seen many times that you define exceptions in this way:
gem_dir/lib/gem_name/exceptions.rb
and defined as:
module GemName
class AuthenticationError < StandardError; end
class InvalidUsername < AuthenticationError; end
end
an example of this would be something like th...
Is there a way to auto expand objects in Chrome Dev Tools?
...creatively (ab)using console.group:
expandedLog = (function(){
var MAX_DEPTH = 100;
return function(item, depth){
depth = depth || 0;
if (depth > MAX_DEPTH ) {
console.log(item);
return;
}
if (_.isObject(item)) {
_.e...