大约有 44,000 项符合查询结果（耗时：0.0675秒） [XML]
Split delimited strings in a column and insert as new rows [duplicate]
...e with the first column from your source data. Finally, you use reshape to convert the data into a long form.
temp <- data.frame(Ind = mydf$V1,
read.csv(text = as.character(mydf$V2), header = FALSE))
temp1 <- reshape(temp, direction = "long", idvar = "Ind",
...
Unable to access JSON property with “-” dash
...-CodeSlayer2010: You should use style.boxShadow instead. The style object converts hyphens to camelCase.
– SLaks
Oct 5 '16 at 16:21
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Access nested dictionary items via a list of keys?
...Dict(v,parent+[k]) for k,v in dataDict.items()], [])
One use of it is to convert the nested tree to a pandas DataFrame, using the following code (assuming that all leafs in the nested dictionary have the same depth).
def dict_to_df(dataDict):
ret = []
for k in keysInDict(dataDict):
...
In Ruby how do I generate a long string of repeated text?
...ts. It certainly could (for example, automatically making a best-effort to convert the argument to a FixNum) but the language designers decided against embracing Ruby's Perlish inspirations too fully.
– FMc
Jan 15 '17 at 2:12
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Should C# methods that *can* be static be static? [closed]
...sheer number of call sites might make searching to see if it's possible to convert a static method to a non static one too costly. Many times people will see the number of calls, and say "ok... I better not change this method, but instead create a new one that does what I need".
That can result in ...
Create an empty list in python with certain size
...n do this to initialize a list with values from 0 to 9:
lst = range(10)
And in Python 3.x:
lst = list(range(10))
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Thread vs ThreadPool
What is the difference between using a new thread and using a thread from the thread pool? What performance benefits are there and why should I consider using a thread from the pool rather than one I've explicitly created? I'm thinking specifically of .NET here, but general examples are fine.
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How to clear MemoryCache?
.... What is the quickest way to do this? Should I loop through all the items and remove them one at a time or is there a better way?
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Get dimension from XML and set text size in runtime
...ur phone screen density is obviously hdpi (240dpi) so it uses 1.5 scale to convert dp to sp. Simple math 18 * 1.5 = 27.
It seems that your tablet density is mdpi (160dpi) so scale is just 1:1.
But if you compare real size of both texts it should be the same.
The best way is just create two dimens...
Accessing nested JavaScript objects and arays by string path
...ect.byString = function(o, s) {
s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
s = s.replace(/^\./, ''); // strip a leading dot
var a = s.split('.');
for (var i = 0, n = a.length; i < n; ++i) {
var k = a[i];
if (k in o) {
...