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How to create a GUID/UUID in Python
...ps://docs.python.org/3/library/uuid.html
Example (working on 2 and 3):
>>> import uuid
>>> uuid.uuid4()
UUID('bd65600d-8669-4903-8a14-af88203add38')
>>> str(uuid.uuid4())
'f50ec0b7-f960-400d-91f0-c42a6d44e3d0'
>>> uuid.uuid4().hex
'9fe2c4e93f654fdbb24c02b152597...
Getting indices of True values in a boolean list
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Use enumerate, list.index returns the index of first match found.
>>> t = [False, False, False, False, True, True, False, True, False, False, False, False, False, False, False, False]
>>> [i for i, x in enumerate(t) if x]
[4, 5, 7]
For huge lists, it'd be better to use it...
Initialising an array of fixed size in python [duplicate]
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You can use:
>>> lst = [None] * 5
>>> lst
[None, None, None, None, None]
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how to get last insert id after insert query in codeigniter active record
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Try this
function add_post($post_data){
$this->db->insert('posts', $post_data);
$insert_id = $this->db->insert_id();
return $insert_id;
}
In case of multiple inserts you could use
$this->db->trans_start();
$this->db->trans_complete();
...
How to select from subquery using Laravel Query Builder?
...en, if necessary, you will merge all the bindings:
$sub = Abc::where(..)->groupBy(..); // Eloquent Builder instance
$count = DB::table( DB::raw("({$sub->toSql()}) as sub") )
->mergeBindings($sub->getQuery()) // you need to get underlying Query Builder
->count();
Mind that ...
PHP: merge two arrays while keeping keys instead of reindexing?
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You can simply 'add' the arrays:
>> $a = array(1, 2, 3);
array (
0 => 1,
1 => 2,
2 => 3,
)
>> $b = array("a" => 1, "b" => 2, "c" => 3)
array (
'a' => 1,
'b' => 2,
'c' => 3,
)
>> $a + $b
array (
0 =>...
How do I get a substring of a string in Python?
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>>> x = "Hello World!"
>>> x[2:]
'llo World!'
>>> x[:2]
'He'
>>> x[:-2]
'Hello Worl'
>>> x[-2:]
'd!'
>>> x[2:-2]
'llo Worl'
Python calls this concept "slicing" and it wor...
Find indices of elements equal to zero in a NumPy array
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numpy.where() is my favorite.
>>> x = numpy.array([1,0,2,0,3,0,4,5,6,7,8])
>>> numpy.where(x == 0)[0]
array([1, 3, 5])
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Insert an element at a specific index in a list and return the updated list
...lso insert the element using the slice indexing in the list. For example:
>>> a = [1, 2, 4]
>>> insert_at = 2 # Index at which you want to insert item
>>> b = a[:] # Created copy of list "a" as "b".
# Skip this step if you are ok with modifying the origi...
How can I make Visual Studio wrap lines at 80 characters?
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Tools >> Options >> Text Editor >> All Languages >> General >> Select Word Wrap.
I dont know if you can select a specific number of columns?
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