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How does std::forward work? [duplicate]
... does according to the standard:
§20.2.3 [forward] p2
Returns: static_cast<T&&>(t)
(Where T is the explicitly specified template parameter and t is the passed argument.)
Now remember the reference collapsing rules:
TR R
T& & -> T& // lvalue reference to ...
How do you get the list of targets in a makefile?
... make list:
.PHONY: list
list:
@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$'
Important: On pasting this, make sure that the last line i...
What's the use of ob_start() in php?
Is ob_start() used for output buffering so that the headers are buffered and not sent to the browser? Am I making sense here? If not then why should we use ob_start() ?
...
CSS styling in Django forms
...aken from my answer to:
How to markup form fields with <div class='field_type'> in Django
class MyForm(forms.Form):
myfield = forms.CharField(widget=forms.TextInput(attrs={'class' : 'myfieldclass'}))
or
class MyForm(forms.ModelForm):
class Meta:
model = MyModel
def __i...
error: passing xxx as 'this' argument of xxx discards qualifiers
...ere the value
type is the same as the key type, both
iterator and const_iterator are
constant iterators. It is unspecified
whether or not iterator and
const_iterator are the same type.
So VC++ 2008 Dinkumware implementation is faulty.
Old answer:
You got that error because in certain...
Generate a heatmap in MatPlotLib using a scatter data set
...
x = y = NP.linspace(-5, 5, 100)
X, Y = NP.meshgrid(x, y)
Z1 = ML.bivariate_normal(X, Y, 2, 2, 0, 0)
Z2 = ML.bivariate_normal(X, Y, 4, 1, 1, 1)
ZD = Z2 - Z1
x = X.ravel()
y = Y.ravel()
z = ZD.ravel()
gridsize=30
PLT.subplot(111)
# if 'bins=None', then color of each hexagon corresponds directly to i...
Compile time string hashing
...the code snippet:
// CRC32 Table (zlib polynomial)
static constexpr uint32_t crc_table[256] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d0...
Sending multipart/formdata with jQuery.ajax
...how is it possible to send this Data to the server? The resulting array ( $_POST ) on the serverside php-script is 0 ( NULL ) when using the file-input.
...
How can I find and run the keytool
...n by myself as below quote. It works fine.
"C:\Program Files\Java\jdk1.6.0_26\bin\keytool.exe" -exportcert -alias
> sociallisting -keystore "D:\keystore\SocialListing" |
> "C:\cygwin\bin\openssl.exe" sha1 -binary | "C:\cygwin\bin\openssl.exe"
> base64
...
How do I format a string using a dictionary in python-3.x?
...
Python 3.2 introduced format_map. Similar to str.format(**mapping), except that mapping is used directly and not copied to a dict. This is useful if for example mapping is a dict subclass
– diapir
Jan 17 '15 at 14:...