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addEventListener vs onclick
...se);
Using this approach (DOM Level 2 events), you can attach a theoretically unlimited number of events to any single element. The only practical limitation is client-side memory and other performance concerns, which are different for each browser.
The examples above represent using an anonymous...
How to detect the end of loading of UITableView
...htafoya's comment is right. If you want this code to detect end of loading all data from source, it wouldn't, but that's not the original question. This code is for detecting when all cells that are meant to be visible are displayed. willDisplayCell: used here for smoother UI (single cell usually di...
If i synchronized two methods on the same class, can they run simultaneously?
...reads are shut out of all synchronized instance methods on that object.
In order for the two methods to run concurrently they would have to use different locks, like this:
class A {
private final Object lockA = new Object();
private final Object lockB = new Object();
public void methodA...
Object-orientation in C
...the derived class. Multiple inheritance is much harder - in that case, in order to case between base classes other than the first, you need to manually adjust your pointers based on the proper offsets, which is really tricky and error-prone.
Another (tricky) thing you can do is change the dynamic ...
What's the better (cleaner) way to ignore output in PowerShell? [closed]
...ad and > $null has about a 0.3% overhead.
Addendum 2017-10-16: I originally overlooked another option with Out-Null, the use of the -inputObject parameter. Using this the overhead seems to disappear, however the syntax is different:
Out-Null -inputObject ($(1..1000) | ?{$_ -is [int]})
And no...
SSH Key - Still asking for password and passphrase
...assword, which will be stored in your keychain.
Edit - Handle restart
In order to not have to fill in your password even after a restart add the following to your ssh configuration file (commonly located at ~/.ssh/config)
Host *
UseKeychain yes
AddKeysToAgent yes
IdentityFile ~/.ssh/id_rsa
...
How does one generate a random number in Apple's Swift language?
... introduces new easy-to-use random functions for many data types.
You can call the random() method on numeric types.
let randomInt = Int.random(in: 0..<6)
let randomDouble = Double.random(in: 2.71828...3.14159)
let randomBool = Bool.random()
...
Use gulp to select and move directories and their files
I'm currently using gulp to call a bash script that cleans my dist/ directory and moves the appropriate files to the clean directory. I would like this to be done with gulp because I am not sure the script would work on a non *nix file system.
So far, I'm using the gulp-clean module to clean the...
How to programmatically send a 404 response with Express/Node?
...on for this on the response object. Just chain it in somewhere before you call send.
res.status(404) // HTTP status 404: NotFound
.send('Not found');
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hidden symbol ... is referenced by DSO 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
hidden symbol ... is referenced by DSO 剖析DSO是动态共享对象，Linux报hidden symbol is referenced by DSO错误的原因是符号(函数)未导出导致的，添加导出申明即可解决：__attribute__ ((visibility("default")) DSO 是动态共享对象，Linux报“hidden symbol .....