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In Python how should I test if a variable is None, True or False
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120
Don't fear the Exception! Having your program just log and continue is as easy as:
try:
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...例看个例子吧：#! bin shcd ~mkdir shell_tutcd shell_tutfor ((i=0; i<10; i++)); do touch test_$i.txt...
什么是Shell脚本
示例
看个例子吧：
#!/bin/sh
cd ~
mkdir shell_tut
cd shell_tut
for ((i=0; i<10; i++)); do
touch test_$i.txt
done
示例解释
第1行：...
How to check if array element exists or not in javascript?
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18 Answers
18
Active
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Convert a String In C++ To Upper Case
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edited Jul 31 at 6:54
ana
3766 bronze badges
answered Apr 9 '09 at 17:47
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How to start two threads at “exactly” the same time
... threads should start at same split second. I understand, if you do thread1.start() , it will take some milliseconds before the next execution of thread2.start() .
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Hide console window from Process.Start C#
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120
I had a similar issue when attempting to start a process without showing the console window....
MySQL convert date string to Unix timestamp
...convert DATETIME to UNIX timestamp:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p'))
Here's an example of how to change date format:
SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p')),'%m-%d-%Y %h:%i:%p')
Documentation: UNIX_TIMES...
How do you run a SQL Server query from PowerShell?
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167
For others who need to do this with just stock .NET and PowerShell (no additional SQL tools in...
Why does Math.floor return a double?
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edited Apr 27 '19 at 14:38
Gama11
21.5k77 gold badges5151 silver badges7373 bronze badges
ans...