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Why is Node.js single threaded? [closed]
...
And you know what? In my opinion that theory's been borne out. A node.js app that isn't doing CPU intensive stuff can run thousands more concurrent connections than Apache or IIS or other thread-based servers.
The single threaded, async nature does make things complicated. But do you honestly thi...
How can I determine the current line number in JavaScript?
...al source code, so it has the wrong line numbers. (That's probably what's happening to Hermann.) Does anyone know how to make javascript see the original PHP source code line numbers? The solution probably involves some kind of "source map" generation, but I can't find how to do it. Surely this is a...
gem install: Failed to build gem native extension (can't find header files)
...
this worked when i had a problem trying to create an app using ruby on rails. it complained about how it can't install json and bundler can't continue. installing ruby-devel worked.
– Jack
Nov 4 '12 at 20:43
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Android: How to change CheckBox size?
...placing your own custom image, make sure you replace every checkbox in the app (even if there is no size change) or else you may end up with a mix of styles on certain devices.
– DougW
Feb 6 '12 at 22:45
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What is the bit size of long on 64-bit Windows?
...ides, in signed (listed) and unsigned (not listed; prefix with 'u'):
int8_t - 8-bit integers
int16_t - 16-bit integers
int32_t - 32-bit integers
int64_t - 64-bit integers
uintptr_t - unsigned integers big enough to hold pointers
intmax_t - biggest size of integer on the platform (might be larger t...
How can I create download link in HTML?
... download, use
<a href="http://example.com/files/myfile.pdf" target="_blank">Download</a>
the target=_blank will make a new browser window appear before the download starts. That window will usually be closed when the browser discovers that the resource is a file download.
Note tha...
Instance variables vs. class variables in Python
...test:
import timeit
setup='''
XGLOBAL= 5
class A:
xclass = 5
def __init__(self):
self.xinstance = 5
def f1(self):
xlocal = 5
x = self.xinstance
def f2(self):
xlocal = 5
x = A.xclass
def f3(self):
xlocal = 5
x = XGLOBAL
...
“PKIX path building failed” and “unable to find valid certification path to requested target”
...ermine location of cacerts files, eg.
C:\Program Files (x86)\Java\jre1.6.0_22\lib\security\cacerts.
Next import the example.cer file into cacerts in command line:
keytool -import -alias example -keystore C:\Program Files (x86)\Java\jre1.6.0_22\lib\security\cacerts -file example.cer
You will be...
Checking if a double (or float) is NaN in C++
...d portable solution. You can even test for -ffast-math by testing for the __FAST_MATH__ macro and switch to a different implementation in that case (e.g. use unions and bit twiddling).
– Adam Rosenfield
Mar 27 '11 at 23:45
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When to use symbols instead of strings in Ruby?
...eference the symbol, saving memory. So every time the interpreter reads :my_key it can take it from memory instead of instantiate it again. This is less expensive than initializing a new string every time.
You can get a list all symbols that are already instantiated with the command Symbol.all_sym...