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Best way to select random rows PostgreSQL
...lass WHERE oid = 'schema_name.big'::regclass;
As long as ct isn't much smaller than id_span, the query will outperform other approaches.
WITH params AS (
SELECT 1 AS min_id -- minimum id <= current min id
, 5100000 AS id_span -- rounded up. (max_id - m...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...- snip -- snip ----------8<-------------
To get the code to work sans error msg's to stderr, I had to add the single quotes arount the variable assignments for %%a, %%b and %%c. My locale (PT) was causing errors at one stage in the looping/parsing where stuff like "set =20" was getting execute...
Using generic std::function objects with member functions in one class
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A non-static member function must be called with an object. That is, it always implicitly passes "this" pointer as its argument.
Because your std::function signature specifies that your function doesn't take any arguments (<void(void)>), you must bind the ...
Sequelize.js delete query?
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Shouldn't you use catch to catch the error instead of callback?
– Ahmed Ghrib
Feb 5 at 14:16
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Properties file in python (similar to Java Properties)
...les may not include sections so this configParser doesn't seem reliable at all
– BiAiB
Jul 17 at 9:27
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Reading binary file and looping over each byte
...hile byte != "":
# Do stuff with byte.
byte = f.read(1)
finally:
f.close()
Python 2.5-2.7
with open("myfile", "rb") as f:
byte = f.read(1)
while byte != "":
# Do stuff with byte.
byte = f.read(1)
Note that the with statement is not available in versio...
Move all files except one
... For ZSH user, instead of using shopt (which will give command not found error), add this to your .zshrc: setopt extended_glob then the syntax for glob will also change accordingly. Thus use mv ~/path/to/source^(exception) ~/path/to/target/folder should do
– Alex Xiong
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MaterialDialog 对话框增强扩展 · App Inventor 2 中文网
... 事件
方法
自定义对话框
Toast 提示
底部面板（Bottom Sheet）
WebView 对话框
视图点击
抽屉菜单（Drawer）
日期/时间选择器
列表选择对话框
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try/catch + using, right syntax
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I prefer the second one. May as well trap errors relating to the creation of the object as well.
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Initialise a list to a specific length in Python [duplicate]
...dicts, do not use [{}]*10 -- that would give you a list with the same initially-empty dict ten times, not ten distinct ones. Rather, use [{} for i in range(10)] or similar constructs, to construct ten separate dicts to make up your list.
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