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To ARC or not to ARC? What are the pros and cons? [closed]
...ge collection. It has no GC runtime overhead. The compiler inserts retains and releases in all the places you should have anyway. But it's smarter than you and can optimize out the ones that aren't actually needed (just like it can unroll loops, eliminate temporary variables, inline functions, etc.)...
What happens to an open file handle on Linux if the pointed file gets moved or deleted
What happens to an open file handle on Linux if the pointed file meanwhile gets:
7 Answers
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Self-references in object literals / initializers
...To complete my above statement, since foo is beeing declared as a variable and c will only be evaluated at the time it is invoked, using foo inside c will work, as opposed to this (be careful though)
– Bernardo Dal Corno
Apr 19 '18 at 20:11
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unique object identifier in javascript
I need to do some experiment and I need to know some kind of unique identifier for objects in javascript, so I can see if they are the same. I don't want to use equality operators, I need something like the id() function in python.
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Embedding Base64 Images
...:
Gecko-based, such as Firefox, SeaMonkey, XeroBank, Camino, Fennec and K-Meleon
Konqueror, via KDE's KIO slaves input/output system
Opera (including devices such as the Nintendo DSi or Wii)
WebKit-based, such as Safari (including on iOS), Android's browser, Epiphany and Midori (WebKit ...
What is the difference between a string and a byte string?
I am working with a library which returns a byte string and I need to convert this to a string.
7 Answers
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How to convert int[] to Integer[] in Java?
I'm new to Java and very confused.
13 Answers
13
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How to profile a bash shell script slow startup?
...bashstart.PID.log that shows the seconds.nanoseconds timestamp of each command that was executed. The difference from one time to the next is the amount of time that the intervening step took.
As you narrow things down, you can move set -x later and set +x earlier (or bracket several sections of in...
What's the difference between “version number” in iTunes Connect, “bundle version”, “bundle version
... 12345AB). This is shown in the About window for Mac OS X apps for example and is often more a "Build Number" than a "Version Number".
Bundle Version String (CFBundleShortVersionString)
This value is used as the "real" version number. This must be the same string as used for the version in iTunes Co...
default select option as blank
...n't show up in the list anymore.
Option 2
If you don't want to write CSS and expect the same behaviour of the solution above, just use:
<option hidden disabled selected value> -- select an option -- </option>
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