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How to change the CHARACTER SET (and COLLATION) throughout a database?
...tf8mb4_0900_ai_ci;
change table collation:
ALTER TABLE <table_name> CONVERT TO CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
change column collation:
ALTER TABLE <table_name> MODIFY <column_name> VARCHAR(255) CHARACTER SET utf8 COLLATE utf8mb4_0900_ai_ci;
What do the parts of ...
Format number to 2 decimal places
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@UncleIroh, No I think he actuallyy means convert(2229.999 as decimal(4,2)).
– Pacerier
Apr 28 '15 at 6:58
3
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Using StringWriter for XML Serialization
...on must match the actual encoding of the bytes.
The 8-bit encoding will be converted into UTF-16 LE by the XML datatype
With the points outlined above in mind, and given that strings in .NET are always UTF-16 LE / UCS-2 LE (there is no difference between those in terms of encoding), we can answer...
MIT官方已升级至2.71版本，几乎就是仅增加一个全新主题 - App Inventor 2 ...
2.71 版本主要更新内容：Changes between nb196 and nb197 (July 7, 2024)
This is a component release which includes bugfixes and improvements. It includes a new Android MIT AI2 Companion versions 2.71 (from Google Play) and 2.71u (directly downloaded from MIT App Inventor).
Features:
Ne...
MQTT 之保留消息（Retained Messages） - 创客硬件开发 - 清泛IT社区，为创新赋能！
保留消息定义 如果PUBLISH消息的RETAIN标记位被设置为1，则称该消息为“保留消息”；Broker对保留消息的处理 Broker会存储每个Topic的最后一条保留消息及其Qos，当订阅该Topic的客户端上线后，Broker需要将该消息投递给它。A r...
How do you remove duplicates from a list whilst preserving order?
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Converting to some custom kind of dict just to take keys? Just another crutch.
– Nakilon
Jun 14 '13 at 13:40
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List comprehension on a nested list?
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Here is how to convert nested for loop to nested list comprehension:
Here is how nested list comprehension works:
l a b c d e f
↓ ↓ ↓ ↓ ↓ ↓ ↓
In [1]: l = [ [ [ [ [ [ 1 ] ] ] ] ] ]
In [2]: for a in l...
Create list of single item repeated N times
...t that can be used to create a list if you wish! Let's try that again, but converting to a list:
>>> timeit.timeit('list(itertools.repeat(0, 10))', 'import itertools', number = 1000000)
1.7508119747063233
So if you want a list, use [e] * n. If you want to generate the elements lazily, us...
How to change a django QueryDict to Python Dict?
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This is what I've ended up using:
def qdict_to_dict(qdict):
"""Convert a Django QueryDict to a Python dict.
Single-value fields are put in directly, and for multi-value fields, a list
of all values is stored at the field's key.
"""
return {k: v[0] if len(v) == 1 else v ...
TypeError: ObjectId('') is not JSON serializable
...y.
But this question shows that we can serialize using json_util.dumps(), convert back to dict using json.loads() and finally call Flask's jsonify on it.
Example (derived from previous question's answer):
from bson import json_util, ObjectId
import json
#Lets create some dummy document to prove...