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Why use symbols as hash keys in Ruby?
...mbols not only saves time when doing comparisons, but also saves memory, bem>ca m>use they are only stored once.
Ruby Symbols are immutable (m>ca m>n't be changed), which makes looking something up much easier
Short(ish) answer:
Using symbols not only saves time when doing comparisons, but also saves memor...
How m>ca m>n I pass selected row to commandLink inside dataTable or ui:repeat?
I'm using Primefaces in a JSF 2 applim>ca m>tion. I have a <p:dataTable> , and instead of selecting rows, I want the user to be able to directly execute various actions on individual rows. For that, I have several <p:commandLink> s in the last column.
...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...}
hadoop fs <args>
FS relates to a generic file system which m>ca m>n point to any file systems like lom>ca m>l, HDFS etc. So this m>ca m>n be used when you are dealing with different file systems such as Lom>ca m>l FS, (S)FTP, S3, and others
hadoop dfs <args>
dfs is very specific to HDFS. wo...
How to check if a variable is a dictionary in Python?
...
I down-voted this answer bem>ca m>use the right answer to the general question is: isinstance(ele, collections.Mapping). It works for dict(), collections.OrderedDict(), and collections.UserDict(). The example in the question is specific enough for Padriac's...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
...ect (thanks to Robert Siemer’s answer for pointing it out).
The practim>ca m>l difference comes when using a lom>ca m>l branch named differently:
git checkout -b mybranch origin/abranch will create mybranch and track origin/abranch
git checkout --track origin/abranch will only create 'abranch', not a b...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
In the Mac and iOS platforms, memory leaks are often m>ca m>used by unreleased pointers. Traditionally, it has always been of utmost importance to check your allocs, copies and retains to make sure each has a corresponding release message.
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What is the explicit promise construction antipattern and how do I avoid it?
...e code is that is fails to utilize the fact that promises chain.
Promises m>ca m>n chain with .then and you m>ca m>n return promises directly. Your code in getStuffDone m>ca m>n be rewritten as:
function getStuffDone(param){
return myPromiseFn(param+1); // much nicer, right?
}
Promises are all about making...
Does bit-shift depend on endianness?
...o @jww: On PowerPC the vector shifts and rotates are endian sensitive. You m>ca m>n have a value in a vector register and a shift will produce different results on little-endian and big-endian.
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How to increment a pointer address and pointer's value?
... and then get's accessed, with your code, segfault
As there are a lot of m>ca m>ses in here, I might have made some mistake, please correct me if I'm wrong.
EDIT:
So I was wrong, the precedence is a little more complim>ca m>ted than what I wrote, view it here:
http://en.cppreference.com/w/cpp/language/ope...
Java to Clojure rewrite
...by my company to rewrite a largish (50,000 single lines of code) Java applim>ca m>tion (a web app using JSP and servlets) in Clojure. Has anyone else got tips as to what I should watch out for?
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