大约有 38,000 项符合查询结果（耗时：0.0429秒） [XML]
Converting between datetime, Timestamp and datetime64
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Format a number as 2.5K if a thousand or more, otherwise 900
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When should you NOT use a Rules Engine? [closed]
... a way to share a common rule set among many objects.
I prefer a simpler, more data driven approach wherever possible.
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Command to get nth line of STDOUT
...just for variety:
ls -l | sed -n 2p
Using this alternative, which looks more efficient since it stops reading the input when the required line is printed, may generate a SIGPIPE in the feeding process, which may in turn generate an unwanted error message:
ls -l | sed -n -e '2{p;q}'
I've seen t...
Difference between knockout View Models declared as object literals vs functions
...) {
this.items.remove(item);
}.bind(this);
};
There is much more that could be said on this topic and many patterns that you could explore (like module pattern and revealing module pattern), but basically using a function gives you more flexibility and control over how the object gets...
How does git store files?
...!)"
What is a git “Snapshot”?
Learn GitHub
The progit book has the more comprehensive description of a snapshot:
The major difference between Git and any other VCS (Subversion and friends included) is the way Git thinks about its data.
Conceptually, most other systems store information...
How can I check if a key exists in a dictionary? [duplicate]
...g
Associative arrays are called dictionaries in Python and you can learn more about them in the stdtypes documentation.
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Code-first vs Model/Database-first [closed]
...API there are no real technical differences between those approaches? It's more about development/deployment process/methodology? For example, I have separate enviroments for Dev/Test/Beta/Prod and I will upgrade database manually on Beta/Prod as changes to the schema might require some complex data...
What is the best way to compare floats for almost-equality in Python?
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Reading large text files with streams in C#
...dding a BufferedStream improved performance by 100x in this instance. For more see Unbuffered Output Very Slow
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