大约有 11,400 项符合查询结果（耗时：0.0199秒） [XML]
Should I use a data.frame or a matrix?
When should one use a data.frame , and when is it better to use a matrix ?
6 Answers
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Peak signal detection in realtime timeseries data
Update: The best performing algorithm so far is this one .
33 Answers
33
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Convert JSON string to dict using Python
I'm a little bit confused with JSON in Python.
To me, it seems like a dictionary, and for that reason
I'm trying to do that:
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How to fetch the row count for all tables in a SQL SERVER database [duplicate]
I am searching for a SQL Script that can be used to determine if there is any data (i.e. row count) in any of the tables of a given database.
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How to sort objects by multiple keys in Python?
Or, practically, how can I sort a list of dictionaries by multiple keys?
8 Answers
8
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Pass Variables by Reference in Javascript
How do I pass variables by reference in JavaScript? I have 3 variables that I want to perform several operations to, so I want to put them in a for loop and perform the operations to each one.
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JavaScript OR (||) variable assignment explanation
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edited Feb 5 '12 at 20:43
Lightness Races in Orbit
350k6666 gold badges574574 silver badges955955 bronze badges
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Nullable vs. int? - Is there any difference?
Apparently Nullable<int> and int? are equivalent in value. Are there any reasons to choose one over the other?
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What are the basic rules and idioms for operator overloading?
Note: The answers were given in a specific order , but since many users sort answers according to votes, rather than the time they were given, here's an index of the answers in the order in which they make most sense:
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Contains case insensitive
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if (referrer.toLowerCase().indexOf("ral") === -1) {
The same can also be achieved using a Regular Expression (especially useful when you want to test against dynamic patterns):
if (!/Ral/i.test(referrer)) {
// ^i = Ignore case flag for RegExp
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