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Extracting just Month and Year separately from Pandas Datetime column
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Note that the resulting column is not of the datetime64 dtype anymore. Using df.my_date_column.astype('datetime64[M]'), as in @Juan's answer converts to dates representing the first day of each month.
– Nickolay
May 26 '18 at 19:52
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C++ Best way to get integer division and remainder
...imize, though, at least for g++. A simple experiment with g++ 6.3.0 on x86_64 revealed that with no optimization at all, you get two idivl instructions, but with -O1 or greater, you get one. As the manual says, “Without any optimization option … Statements are independent”.
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... name: aaa
db_schema: test
db_table: demo_test
key_columns: c1
value_columns: c2
flags: c3
cas_column: c4
expire_time_column: c5
unique_idx_name_on_key: PRIMARY
如上已经有了test数据库的demo_te...
How to find the mysql data directory from command line in windows
...----+
| basedir | /usr/local/mysql-5.7.17-macos10.12-x86_64/ |
| character_sets_dir | /usr/local/mysql-5.7.17-macos10.12-x86_64/share/charsets/ |
| datadir | /usr/local/mysql/data/ |
| innodb_data_home_dir ...
In-memory size of a Python structure
...s there a reference for the memory size of Python data stucture on 32- and 64-bit platforms?
7 Answers
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Javascript how to split newline
... alert(ks[k]);
});
});
});
})(jQuery);
Demo
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How can I add the new “Floating Action Button” between two widgets/layouts
...or"
app:floatingActionButtonSize="mini"
/>
Try to compile the demo app. There is exhaustive example: light and dark themes, using with ListView, align between two Views.
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Connecting to remote URL which requires authentication using Java
...pass = username + ":" + password;
String basicAuth = "Basic " + new String(Base64.getEncoder().encode(userpass.getBytes()));
uc.setRequestProperty ("Authorization", basicAuth);
InputStream in = uc.getInputStream();
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JS strings “+” vs concat method [duplicate]
...>The concat() method joins two or more strings</p>
<p id="demo"></p>
<p id="demo1"></p>
<script>
var text1 = 4;
var text2 = "World!";
document.getElementById("demo").innerHTML = text1 + text2;
//Below Line can't produce result
document.getElementB...
H2 in-memory database. Table not found
I've got a H2 database with URL "jdbc:h2:test" . I create a table using CREATE TABLE PERSON (ID INT PRIMARY KEY, FIRSTNAME VARCHAR(64), LASTNAME VARCHAR(64)); . I then select everything from this (empty) table using SELECT * FROM PERSON . So far, so good.
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