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Python Dictionary Comprehension
... n**2 for n in range(5)}
>>> print d
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16}
If you want to set them all to True:
>>> d = {n: True for n in range(5)}
>>> print d
{0: True, 1: True, 2: True, 3: True, 4: True}
What you seem to be asking for is a way to set multiple keys at once...
手电筒使用指导 · App Inventor 2 中文网
.navbar .nav-link .mdi, .navbar .dropdown-item .mdi { margin-right: 6px; opacity: .7; } 创建 Apps 文档 文档首页 内置块参考文档 组件参考文档 拓展参考文档 概念参考文档 IoT 参考文档 技术和其他指...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
...
Override and reset CSS style: auto or none don't work
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196
I believe the reason why the first set of properties will not work is because there is no auto v...
Profiling Vim startup time
...
If you're using Vim 7.2.269 or later, then there's the --startuptime option you can use.
vim --startuptime vim.log
from the help (vim -h):
--startuptime <file> Write startup timing messages to <file>
...
MySQL, Check if a column exists in a table with SQL
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268
This works well for me.
SHOW COLUMNS FROM `table` LIKE 'fieldname';
With PHP it would be som...
Javascript - sort array based on another array
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georggeorg
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Lock Escalation - What's happening here?
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168
"Lock Escalation" is how SQL handles locking for large updates. When SQL is going to change a l...