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Good open source django project for learning [closed]
... to find popular projects is directly on GitHub: https://github.com/search?q=django
Finally:
Awesome Django @ https://github.com/wsvincent/awesome-django
Awesome Python @ https://github.com/vinta/awesome-python
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Query to list number of records in each table in a database
...up, you can also use this:
SELECT
t.NAME AS TableName,
i.name as indexName,
p.[Rows],
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
(sum(a.used_pages) * 8) / 1024...
Batch script to delete files
...der" changes the current directory the batch will be looking at. keep the
quotations and change path of folder to which ever path you aiming for.
del "file name/ or *.txt etc..." will delete the file in the current directory your batch is looking at, just don't add a directory path before the file...
What does ON [PRIMARY] mean?
... drive D:\ of your server. you could then create another filegroup called Indexes. This filegroup could reside on drive E:\ of your server.
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fo...
“git rm --cached x” vs “git reset head -- x”?
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There are three places where a file, say, can be - the tree, the index and the working copy. When you just add a file to a folder, you are adding it to the working copy.
When you do something like git add file you add it to the index. And when you commit it, you add it to the tree as well...
Find MongoDB records where array field is not empty
...ind({ pictures: { $exists: true, $not: {$size: 0} } })
MongoDB don't use indexes if $size is involved, so here is a better solution:
ME.find({ pictures: { $exists: true, $ne: [] } })
Since MongoDB 2.6 release, you can compare with the operator $gt but could lead to unexpected results (you can f...
How to remove item from list in C#?
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List<T> has two methods you can use.
RemoveAt(int index) can be used if you know the index of the item. For example:
resultlist.RemoveAt(1);
Or you can use Remove(T item):
var itemToRemove = resultlist.Single(r => r.Id == 2);
resultList.Remove(itemToRemove);
When yo...
How do I remove newlines from a text file?
...? - - I think sed is the best option like described here stackoverflow.com/q/16414410/54964
– Léo Léopold Hertz 준영
Nov 5 '16 at 13:23
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How to check whether a pandas DataFrame is empty?
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I use the len function. It's much faster than empty. len(df.index) is even faster.
import pandas as pd
import numpy as np
df = pd.DataFrame(np.random.randn(10000, 4), columns=list('ABCD'))
def empty(df):
return df.empty
def lenz(df):
return len(df) == 0
def lenzi(df):
...
php出现 Notice: Undefined index: xxx 的解决方法 - 更多技术 - 清泛网 - 专注IT技能提升
php出现 Notice: Undefined index: xxx 的解决方法Php_Notice_Undefined_index方法出现 "Undefined index: xxx "警告的原因：PHP 本身不需要事先声明变量即可直接使用，但是对未声明变量会有提示，最好的办法是使用变量之前先检查变量是否存在。...