大约有 47,000 项符合查询结果（耗时：0.0656秒） [XML]
Why does ~True result in -2?
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240
int(True) is 1.
1 is:
00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 Fl...
Storing R.drawable IDs in XML array
... within your /res/values folder that looks like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<integer-array name="random_imgs">
<item>@drawable/car_01</item>
<item>@drawable/balloon_random_02</item>
<item>@draw...
Number of lines in a file in Java
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240
This is the fastest version I have found so far, about 6 times faster than readLines. On a 150MB...
How to get the name of the calling method?
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puts caller[0]
or perhaps...
puts caller[0][/`.*'/][1..-2]
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How do I kill background processes / jobs when my shell script exits?
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edited Dec 12 '08 at 16:33
answered Dec 11 '08 at 17:57
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Selecting a row of pandas series/dataframe by integer index
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echoing @HYRY, see the new docs in 0.11
http://pandas.pydata.org/pandas-docs/stable/indexing.html
Here we have new operators, .iloc to explicity support only integer indexing, and .loc to explicity support only label indexing
e.g. imagine this scenario
In ...
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...est version, on Hotspot 8, is:
MyClass[] arr = myList.toArray(new MyClass[0]);
I have run a micro benchmark using jmh the results and code are below, showing that the version with an empty array consistently outperforms the version with a presized array. Note that if you can reuse an existing arr...
SQL keys, MUL vs PRI vs UNI
...at column.
– pgoetz
Aug 7 '19 at 16:07
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Multiple queries executed in java in single statement
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140
I was wondering if it is possible to execute something like this using JDBC.
"SELECT FROM * TAB...
How do you connect localhost in the Android emulator? [duplicate]
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Use 10.0.2.2 to access your actual machine.
As you've learned, when you use the emulator, localhost (127.0.0.1) refers to the device's own loopback service, not the one on your machine as you may expect.
You can use 10.0.2.2 to ...