大约有 44,500 项符合查询结果（耗时：0.0359秒） [XML]
How to filter rows in pandas by regex
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200
Use contains instead:
In [10]: df.b.str.contains('^f')
Out[10]:
0 False
1 True
2 ...
Safe (bounds-checked) array lookup in Swift, through optional bindings?
...ned to stumble on a nicer way of implementing this functionality:
Swift 3.2 and newer
extension Collection {
/// Returns the element at the specified index if it is within bounds, otherwise nil.
subscript (safe index: Index) -> Element? {
return indices.contains(index) ? self[i...
MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...b.org/downloads
实验环境使用的Mongodb版本为mongodb-linux-x86_64-2.6.0
由三台虚拟机搭建，配置为单核,1G内存。实验环境如下:
MongoDB的副本集不同于以往的主从模式。
在集群Master故障的时候，副本集可以自动投票，选举出新的Master，...
Rotating x axis labels in R for barplot
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labs <- paste(names(table(mtcars$cyl)), "cylinders")
text(cex=1, x=x-.25, y=-1.25, labs, xpd=TRUE, srt=45)
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Can't compile project when I'm using Lombok under IntelliJ IDEA
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32 Answers
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How can I configure the font size for the tree item in the package explorer in Eclipse?
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23 Answers
23
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Print second last column/field in awk
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286
awk '{print $(NF-1)}'
Should work
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Adding days to $Date in PHP
I have a date returned as part of a mySQL query in the form 2010-09-17
9 Answers
9
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How do I programmatically determine if there are uncommitted changes?
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297
UPDATE: the OP Daniel Stutzbach points out in the comments that this simple command git diff-i...
Can mustache iterate a top-level array?
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answered Apr 4 '12 at 15:15
Dan JordanDan Jordan
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