大约有 11,600 项符合查询结果（耗时：0.0211秒） [XML]
How to create empty data frame with column names specified in R? [duplicate]
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Just create a data.frame with 0 length variables
eg
nodata <- data.frame(x= numeric(0), y= integer(0), z = character(0))
str(nodata)
## 'data.frame': 0 obs. of 3 variables:
## $ x: num
## $ y: int
## $ z: Factor w/ 0 levels:
or to create a data.frame ...
How to get current PHP page name [duplicate]
I've a file called demo.php where I don't have any GET variables in the URL, so if I want to hide a button if am on this page I can't use something like this:
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How to get a list of all valid IP addresses in a local network? [closed]
... the entire .1 to .254 range
This does a simple ping scan in the entire subnet to see which hosts are online.
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Binding ng-model inside ng-repeat loop in AngularJS
... trying to deal with the issue of scope inside of an ng-repeat loop - I've browsed quite a few questions but have not quite been able to get my code to work.
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Are complex expressions possible in ng-hide / ng-show?
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Use a controller method if you need to run arbitrary JavaScript code, or you could define a filter that returned true or false.
I just tested (should have done that first), and something like ng-show="!a && b" worked as expected.
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Best way to convert list to comma separated string in java [duplicate]
...t & would like to convert it to comma separated string. My approach would be as shown below, but looking for other opinion as well.
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Allowing specific values for an Argparse argument [duplicate]
Is it possible to require that an argparse argument be one of a few preset values?
1 Answer
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Concatenate multiple result rows of one column into one, group by another column [duplicate]
I'm having a table like this
2 Answers
2
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wget command to download a file and save as a different filename
I am downloading a file using the wget command. But when it downloads to my local machine, I want it to be saved as a different filename.
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Sorting a set of values [closed]
...want to sort each set.
That's easy. For any set s (or anything else iterable), sorted(s) returns a list of the elements of s in sorted order:
>>> s = set(['0.000000000', '0.009518000', '10.277200999', '0.030810999', '0.018384000', '4.918560000'])
>>> sorted(s)
['0.000000000', '0...