大约有 41,400 项符合查询结果（耗时：0.0554秒） [XML]
Check if object value exists within a Javascript array of objects and if not add a new object to arr
...nst arr = [{ id: 1, username: 'fred' }, { id: 2, username: 'bill' }, { id: 3, username: 'ted' }];
function add(arr, name) {
const { length } = arr;
const id = length + 1;
const found = arr.some(el => el.username === name);
if (!found) arr.push({ id, username: name });
return arr...
Is there a way to rename an Xcode 4 scheme?
...
3 Answers
3
Active
...
Difference between var_dump,var_export & print_r
...(4) {
[0]=> string(0) ""
[1]=> bool(false)
[2]=> int(42)
[3]=> array(1) {[0]=>string(2) "42")}
}
print_r is for debugging purposes, too, but does not include the member's type. It's a good idea to use if you know the types of elements in your array, but can be misleading oth...
Remap values in pandas column with a dict
...
373
You can use .replace. For example:
>>> df = pd.DataFrame({'col2': {0: 'a', 1: 2, 2:...
List of all index & index columns in SQL Server DB
...
30 Answers
30
Active
...
How to set selected value of jquery select2?
...
63
To dynamically set the "selected" value of a Select2 component:
$('#inputID').select2('data', {...
How to center a label text in WPF?
...
213
use the HorizontalContentAlignment property.
Sample
<Label HorizontalContentAlignment="Cen...
SQL query for today's date minus two months
...
Abe MiesslerAbe Miessler
73.5k8282 gold badges266266 silver badges436436 bronze badges
...
Using pickle.dump - TypeError: must be str, not bytes
I'm using python3.3 and I'm having a cryptic error when trying to pickle a simple dictionary.
2 Answers
...
Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby
...
13 Answers
13
Active
...