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ALTER TABLE without locking the table?
...n doing an ALTER TABLE statement in MySQL, the whole table is read-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", like ...
How can Xcode 6 adaptive UIs be backwards-compatible with iOS 7 and iOS 6?
...se changed constraints are visible in the iPad Simulator running iOS 7.0.
All size class optimizations are made available to iOS 7, except size classes that have a Compact Height. This has been confirmed by Apple and is now stated directly in the documentation:
For apps supporting versions of iOS ...
Select rows of a matrix that meet a condition
... How does this work if you don't want to specify the column names at all but want to work over all columns in the matrix?
– user5359531
Jul 22 '16 at 22:54
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Kill some processes by .exe file name
... kill a specific instance of a process? I mean, Contains("Spotify")) kills all the instances of Spotify. I want to kill a particular instance of Spotify.
– Banee Ishaque K
Feb 13 '18 at 5:17
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Notepad++ Multi editing
...d select the lines you want. Then type. The text you type is inserted on all of the lines you selected.
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Error when testing on iOS simulator: Couldn't register with the bootstrap server
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As comment below says, you can usually see the hung process in Activity Monitor and kill it there.
– mxcl
Sep 5 '10 at 18:29
13
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How do you update Xcode on OSX to the latest version?
... Just want to also note that this will only show as an update if you installed your version directly from the App Store. However, if you installed it from elsewhere, you will need to re-download the entire new version of Xcode.
– CodeBiker
Aug 3 '13 at 20:39
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How to print a debug log?
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+1 It took me too long to find this answer. This is all I really was looking for. I couldn't figure out how to see what my array contained (working in Drupal).
– SteveS
May 7 '14 at 14:31
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Does using final for variables in Java improve garbage collection?
...ive objects.
The JVM uses a mark-sweep GC algorithm, which has to examine all the live refereces in the GC "root" locations (like all the objects in the current call stack). Each live object is "marked" as being alive, and any object referred to by a live object is also marked as being alive.
Afte...
Passing command line arguments to R CMD BATCH
...of a relict. In any case, the more recent Rscript executable (available on all platforms), together with commandArgs() makes processing command line arguments pretty easy.
As an example, here is a little script -- call it "myScript.R":
## myScript.R
args <- commandArgs(trailingOnly = TRUE)
rnor...