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Django database query: How to get object by id?
...ject, using get() is more straightforward:
obj = Class.objects.get(pk=this_object_id)
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C default arguments
.... Define a companion struct:
typedef struct {
int i;
double x;
} f_args;
Rename your function f_base, and define a wrapper function that sets defaults and calls
the base:
double var_f(f_args in){
int i_out = in.i ? in.i : 8;
double x_out = in.x ? in.x : 3.14;
return f_base(i_...
Bin size in Matplotlib (Histogram)
...width in this example could be found by: (data.max() - data.min()) / number_of_bins_you_want. The + binwidth could be changed to just 1 to make this a more easily understood example.
– Jarad
Jan 22 '18 at 17:31
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How do you 'redo' changes after 'undo' with Emacs?
...
To undo: C-_
To redo after a undo: C-g C-_
Type multiple times on C-_ to redo what have been undone by C-_
To redo an emacs command multiple times, execute your command then type C-xz and then type many times on z key to repea...
Python extract pattern matches
... (.*) is valid")
>>> result = p.search(s)
>>> result
<_sre.SRE_Match object at 0x10555e738>
>>> result.group(1) # group(1) will return the 1st capture (stuff within the brackets).
# group(0) will returned the entire matched text.
'my_user_...
How to smooth a curve in the right way?
... how easy it is to use. Note: I left out the code for defining the savitzky_golay() function because you can literally copy/paste it from the cookbook example I linked above.
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0,2*np.pi,100)
y = np.sin(x) + np.random.random(100) * 0...
What new capabilities do user-defined literals add to C++?
...its>
inline constexpr std::bitset<sizeof...(Bits)>
operator"" _bits() noexcept
{
static_assert(checkbits<Bits...>::valid, "invalid digit in binary string");
return std::bitset<sizeof...(Bits)>((char []){Bits..., '\0'});
}
int
main()
{
auto bits = 0101010101010...
Check orientation on Android phone
...etConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
// In landscape
} else {
// In portrait
}
More information can be found in the Android Developer.
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How to make the 'cut' command treat same sequental delimiters as one?
...re. You could pass < text.txt directly to tr. en.wikipedia.org/wiki/Cat_%28Unix%29#Useless_use_of_cat
– arielf
Aug 9 '14 at 20:10
1
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JavaScript is in array
...if the result > -1 and false if result === -1
– bm_i
Nov 5 '12 at 19:01
11
@bm_i Which faster?...