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Print “hello world” every X seconds
...rrect :\ The age of the two APIs aside, ScheduledExecutorService is simply more intuitively declarative. The use of TimeUnit as a parameter makes it much more clear what is occurring. Gone are the days of code like 5*60*1000 // 5 minutes.
– Tim Bender
Feb 14 '1...
A Regex that will never be matched by anything
...ly then not find the a and return a negative match. (See comment below for more detail.)
* Originally I did not give much thought on multiline-mode regexp, where $ also matches the end of a line. In fact, it would match the empty string right before the newline, so an ordinary character like a ca...
Does Python have a string 'contains' substring method?
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What good are SQL Server schemas?
...naming conventions? I'm not suggesting there NOT a use case for it; it is, more often than not, an addition by subtraction.
– sam yi
Aug 15 '14 at 14:59
6
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Replace comma with newline in sed on MacOS?
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Upvoted. For more info see the "QUOTING" section of man bash.
– tboyce12
Apr 1 '15 at 18:23
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Check for installed packages before running install.packages() [duplicate]
...r) and signal - both have a function filter. Since I use dplyr::filter way more often, I wanted a way to check if signal is installed but not load it.
– Mario Reutter
Apr 11 '19 at 9:33
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What is the correct way to create a single-instance WPF application?
...s
to wait. Since we're not actually wanting to synchronizing our code
(more just check if it is currently in use) we use the overload with
two parameters: Mutex.WaitOne(Timespan timeout, bool exitContext).
Wait one returns true if it is able to enter, and false if it wasn't.
In this case, ...
Automatically deleting related rows in Laravel (Eloquent ORM)
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Why are nested weights bad for performance? Alternatives?
...ic is the same, it can help. Unfortunately I find droid's ConstraintLayout more heavy/verbose to use than iOS' AutoLayout
– AdricoM
Jan 15 '18 at 15:19
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What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
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[Edit]
zxoq at http://news.ycombinator.com/item?id=3672744 has added more interesting new subscripting. (Added with literals):
arr[1] === [arr objectAtIndex:1]
dict[@"key"] === [dict objectForKey:@"key"]
[Edit 2]
The new ObjC literals were discussed in multiple WWDC 2012 sessions. I...