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Is key-value observation (KVO) available in Swift?
...observerContext)
}
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
guard context == &observerContext else {
super.observeValue(forKeyPath: keyPath, of: object, change:...
What does 'synchronized' mean?
...ns, so consider this code
public class SOP {
public static void print(String s) {
System.out.println(s+"\n");
}
}
public class TestThread extends Thread {
String name;
TheDemo theDemo;
public TestThread(String name,TheDemo theDemo) {
this.theDemo = theDemo;
...
Copy object values in Visual Studio debug mode
...ich is type System.Collections.Generic.List 1[[System.ValueTuple 3[[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.String, Sys...
Ubuntu, vim, and the solarized color palette
...e
gconftool-2 --set "/apps/gnome-terminal/profiles/Default/palette" --type string "#070736364242:#D3D301010202:#858599990000:#B5B589890000:#26268B8BD2D2:#D3D336368282:#2A2AA1A19898:#EEEEE8E8D5D5:#00002B2B3636:#CBCB4B4B1616:#58586E6E7575:#65657B7B8383:#838394949696:#6C6C7171C4C4:#9393A1A1A1A1:#FDFDF6...
Displaying the build date
...urces\BuildDate.txt"
Add this file as resource,
now you have 'BuildDate' string in your resources.
To create resources, see How to create and use resources in .NET.
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Are empty HTML5 data attributes valid?
... that empty attribute syntax is exactly equivalent to specifying the empty string as the value for the attribute, as in the following example.
<input disabled="">
So you are allowed to use empty custom data attributes, but special handling is needed to use them as boolean.
When you are acces...
What is the difference between the add and offer methods in a Queue in Java?
... method never returns false if the element is already available Queue<String> q = new PriorityQueue<>(); String b="java"; boolean is1 = q.add(b); boolean is2 = q.add("java"); boolean is3 = q.add(b); boolean is4 = q.offer("java"); boolean ...
How does the NSAutoreleasePool autorelease pool work?
... the drain/release confusion:
int main(void) {
@autoreleasepool {
NSString *string;
string = [[[NSString alloc] init] autorelease];
/* use the string */
}
}
In the example above please note the @autoreleasepool block. This is documented here.
...
node.js shell command execution
...can be called multiple times, and 2) the callback is given a buffer, not a string. Easy to remedy; just change
foo = new run_cmd(
'netstat.exe', ['-an'], function (me, data){me.stdout=data;}
);
into
foo = new run_cmd(
'netstat.exe', ['-an'], function (me, buffer){me.stdout+=buffer.toStri...
top -c command in linux to filter processes listed based on processname
... pgrep to get pid's of matching command lines:
top -c -p $(pgrep -d',' -f string_to_match_in_cmd_line)
top -p expects a comma separated list of pids so we use -d',' in pgrep. The -f flag in pgrep makes it match the command line instead of program name.
...