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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...ar interval and check all of the values in the data structure recursively. By comparison, setting a value on the state will signal to a listener that some state has changed, so React can simply listen for change events on the state and queue up re-rendering.
The virtual DOM is used for efficient re...
specify project file of a solution using msbuild
...file name.
Also, as stated in How to: Build specific targets in solutions by using MSBuild.exe:
If the project name contains any of the characters %, $, @, ;, ., (, ), or ', replace them with an _ in the specified target name.
You can also build multiple projects at once:
msbuild test.sln /t...
error: ‘NULL’ was not declared in this scope
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Now that C++11 is more generally supported by compilers, it might be worth mentioning the nullptr keyword, which is an actual keyword and doesn't require any #includes. It's also more typesafe than NULL.
– templatetypedef
Mar 10 ...
Is there any way in C# to override a class method with an extension method?
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@Alex by mentioning virtual I am simply clarifying what it means to be polymorphic. In virtually all uses of GetHashCode, the concrete type is unknown - so polymorphism is in play. As such, extension methods wouldn't help even if t...
What are the special dollar sign shell variables?
... in the Bash Reference Manual. There are all the environment variables set by the shell.
For a comprehensive index, please see the Reference Manual Variable Index.
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Can we write our own iterator in Java?
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@Giacomo: That's what I meant by "... or provide a means of wrapping a standard iterator in your special Iterator instance..." (and thanks). :-)
– T.J. Crowder
May 1 '11 at 15:45
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No module named setuptools
... imageUploader: {
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Rails: confused about syntax for passing locals to partials
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it has to do with the way ruby evaluates the hash if you're curious in that way.
– sethvargo
Dec 9 '10 at 20:05
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Efficiency of purely functional programming
... an algorithm in the pure Lisp that runs in O(n log n) time (based on work by Ben-Amram and Galil [1992] about simulating random access memory using only pointers). Pippenger also establishes that there are algorithms for which that is the best you can do; there are problems which are O(n) in the im...
Iterating over each line of ls -l output
...s. If you don't want to use awk, instead of parsing output of "ls -l" line by line, you could iterate over all files and do an "ls -l" for each individual file like this:
for x in * ; do echo `ls -ld $x` ; done
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