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Do declared properties require a corresponding instance variable?
Do properties in Objective-C 2.0 require a corresponding instance variable to be declared? For example, I'm used to doing something like this:
...
JOIN queries vs multiple queries
... two select method took 3.7 seconds for 50,000 reads whereas the JOIN took 2.0 seconds on my at-home slow computer. INNER JOIN and LEFT JOIN did not make a difference. Fetching multiple rows (e.g., using IN SET) yielded similar results.
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Scala vs. Groovy vs. Clojure [closed]
...ithout having to learn a new syntax (assuming you know Java). As of Groovy 2.0, it also has growing support for static compilation. Groovy supports closures and has support for programming in a somewhat functional style, although it's still fairly far from the traditional definition of functional pr...
Why JavaScript rather than a standard browser virtual machine?
...pose, which is to script interactivity client side. This is why JavaScript 2.0 got such a bad rap. I mean, why packages, interfaces, classes, and the like, when those are clearly aspects of server-side languages. JavaScript is just fine as a prototype-based language, without being full-blown object ...
Browser statistics on JavaScript disabled [closed]
...l council's emergency numbers just because some crazy web-dude decided Web 2.0 was a must.
– haylem
Feb 29 '12 at 22:01
22
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How many bytes does one Unicode character take?
...rogate pairs. (You must be thinking of the outdated UCS-2, before Unicode 2.0 came out, which encoded 16-bit code points only.) Also, Java doesn't quite use UTF-16, it uses a modified form thereof where the code point 0 is encoded differently.
– rdb
Aug 4 '14...
Select random lines from a file
...ery fast, I sampled a tab-delimited data file with 13 columns, 23.1M rows, 2.0GB uncompressed.
# randomly sample select 5% of lines in file
# including header row, exclude blank lines, new seed
time \
awk 'BEGIN {srand()}
!/^$/ { if (rand() <= .05 || FNR==1) print > "data-sample.txt"}...
HintPath vs ReferencePath in Visual Studio
...et Framework 3.5 the definition is the same, but the comment is wrong. The 2.0 definition is slightly different, it uses $(OutputPath) instead of $(OutDir).
On my machine I have the following versions of the file Microsoft.Common.targets:
C:\Windows\Microsoft.NET\Framework\v2.0.50727\Microsoft.Com...
Is the creation of Java class files deterministic?
...le format versions may be
ordered lexicographically, for example, 1.5 < 2.0 < 2.1. A Java
virtual machine implementation can support a class file format of
version v if and only if v lies in some contiguous range Mi.0 v
Mj.m. Only Sun can specify what range of versions a Java virtual
machine ...
AngularJS : Prevent error $digest already in progress when calling $scope.$apply()
...ork perfectly. I was at a meetup with Brad Green and he said that Angular 2.0 will be huge with no digest cycle using JS's native observe ability and using a polyfill for browsers lacking that. At that point we won't need to do this anymore. :)
– Michael J. Calkins
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