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How to return multiple lines JSX in another return statement in React?
... the tags as function calls (see docs). Then the first one becomes:
{[1,2,3].map(function (n) {
return React.DOM.p(...);
})}
And the second one:
{[1,2,3].map(function (n) {
return (
React.DOM.h3(...)
React.DOM.p(...)
)
})}
It should now be clear that the second snippet doesn't re...
Leading zeros for Int in Swift
...
703
Assuming you want a field length of 2 with leading zeros you'd do this:
import Foundation
for ...
What is the easiest way to push an element to the beginning of the array?
...
390
What about using the unshift method?
ary.unshift(obj, ...) → ary
Prepends objects to t...
cartesian product in pandas
...import DataFrame, merge
df1 = DataFrame({'key':[1,1], 'col1':[1,2],'col2':[3,4]})
df2 = DataFrame({'key':[1,1], 'col3':[5,6]})
merge(df1, df2,on='key')[['col1', 'col2', 'col3']]
Output:
col1 col2 col3
0 1 3 5
1 1 3 6
2 2 4 5
3 2 4 6
See here...
Filtering a list based on a list of booleans
...se]
>>> list(compress(list_a, fil))
[1, 4]
Timing comparisons(py3.x):
>>> list_a = [1, 2, 4, 6]
>>> fil = [True, False, True, False]
>>> %timeit list(compress(list_a, fil))
100000 loops, best of 3: 2.58 us per loop
>>> %timeit [i for (i, v) in zip(list...
How to convert ‘false’ to 0 and ‘true’ to 1 in Python
...
answered Dec 30 '13 at 13:46
Martijn Pieters♦Martijn Pieters
839k212212 gold badges32203220 silver badges28102810 bronze badges
...
How to implement an ordered, default dict? [duplicate]
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|
edited Aug 23 '14 at 20:47
Martin Thoma
81.2k102102 gold badges454454 silver badges700700 bronze badges
...
Comparing two byte arrays in .NET
...l method.
using System;
using System.Linq;
...
var a1 = new int[] { 1, 2, 3};
var a2 = new int[] { 1, 2, 3};
var a3 = new int[] { 1, 2, 4};
var x = a1.SequenceEqual(a2); // true
var y = a1.SequenceEqual(a3); // false
If you can't use .NET 3.5 for some reason, your method is OK.
Compiler\run-time ...
Expanding tuples into arguments
... |
edited May 27 at 13:31
Nicolas Gervais
13.3k77 gold badges3434 silver badges5656 bronze badges
a...
Android Studio suddenly cannot resolve symbols
...
238
You've already gone down the list of most things that would be helpful, but you could try:
Ex...