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What does the ng stand for in Angular.js directives
...f those things that pissed me off it. Efforts should be made to make codes fun to do!!
– Damilola Olowookere
Dec 4 '18 at 0:19
9
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How to pip or easy_install tkinter on Windows
... edited Jan 10 at 19:42
User123
25322 silver badges1717 bronze badges
answered Nov 18 '13 at 9:52
IcyFlame...
How to convert a number to string and vice versa in C++
...n and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *idx = 0);
long doubl...
Android How to adjust layout in Full Screen Mode when softkeyboard is visible
...eHeightPrevious = 0
// I call this in "onResume()" of my fragment
fun addListener() {
viewTreeObserver.addOnGlobalLayoutListener(listener)
}
// I call this in "onPause()" of my fragment
fun removeListener() {
viewTreeObserver.removeOnGlobalLayoutListener(listene...
Capturing Groups From a Grep RegEx
...he following examples and more, which may not be what you're looking for:
123_abc_d4e5
xyz123_abc_d4e5
123_abc_d4e5.xyz
xyz123_abc_d4e5.xyz
To eliminate the second and fourth examples, make your regex like this:
^[0-9]+_([a-z]+)_[0-9a-z]*
which says the string must start with one or more digit...
Advantages of stateless programming?
I've recently been learning about functional programming (specifically Haskell, but I've gone through tutorials on Lisp and Erlang as well). While I found the concepts very enlightening, I still don't see the practical side of the "no side effects" concept. What are the practical advantages of it? ...
How to query nested objects?
...r is a subdocument that contains only the field company with the value 'ABC123' and the field address with the value '123 Street', in the exact order:
db.inventory.find( {
producer: {
company: 'ABC123',
address: '123 Street'
}
});
...
Check if a string contains a number
...RE_D.search(string)
# Output from iPython
# In [18]: %timeit f1('assdfgag123')
# 1000000 loops, best of 3: 1.18 µs per loop
# In [19]: %timeit f2('assdfgag123')
# 1000000 loops, best of 3: 923 ns per loop
# In [20]: %timeit f3('assdfgag123')
# 1000000 loops, best of 3: 384 ns per loop
...
How to sort a dataframe by multiple column(s)
...
You can use the order() function directly without resorting to add-on tools -- see this simpler answer which uses a trick right from the top of the example(order) code:
R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A ...
Decimal number regular expression, where digit after decimal is optional
...pace & comments in regular expression)
For example, it will match:
123
23.45
34.
.45
-123
-273.15
-42.
-.45
+516
+9.8
+2.
+.5
And will reject these non-numbers:
. (single decimal point)
-. (negative decimal point)
+. (plus decimal point)
(empty string)
The simpler solutions can incorre...