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How to cast List to List
...s is too complicated, and it is not perfect. Sometimes you just don't know if there is a pretty solution to satisfy the compiler, even though you know very well the runtime types and you know what you are trying to do is safe. In that case, just do the crude casting as needed, so you can leave work ...
How to make CSS width to fill parent?
...
EDIT:
Those three different elements all have different rendering rules.
So for:
table#bar you need to set the width to 100% otherwise it will be only be as wide as it determines it needs to be. However, if the table rows total width is great...
How to specify a multi-line shell variable?
... Note that read will have an exit code of 1 in this situation; if that matters (you are running with set -e, for example), you'll want add a || true at the end of the first line.
– chepner
Mar 15 '13 at 12:53
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Pandas dataframe get first row of each group
... first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 second
4 5 first
5 6 first
6 7 fourth
To get n first records, you can ...
How should you build your database from source control?
... Do NOT copy data between the environments
How do you deal with potential differences between test and production environments in deployment scripts?
Use templates, so that actually you would produce different set of scripts for each environment (ex. references to external systems, linked databases,...
MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...to lock the data directory, so cannot be used
if a mongod is currently accessing the same path
--directoryperdb if dbpath specified, each db is in a separate
directory
--journal enable journaling
-d [ --db ] ...
Fragment over another fragment issue
...main), my main fragment still reacts to clicks (we can click a button even if we don't see it).
12 Answers
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How to remove an element from an array in Swift
How can I unset/remove an element from an array in Apple's new language Swift?
18 Answers
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How to open a file using the open with statement
... Read a list of names from a file line by line into an output file.
If a line begins with a particular name, insert a string of text
after the name before appending the line to the output file.
'''
with open(newfile, 'w') as outfile, open(oldfile, 'r', encoding='utf-8') as infile...
What is the difference between window, screen, and document in Javascript?
... used interchangeably as the global environment for the DOM. What is the difference (if there is one) and when should I use each one?
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