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Bash, no-arguments warning, and case decisions
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178
if [[ $# -eq 0 ]] ; then
echo 'some message'
exit 0
fi
case "$1" in
1) echo 'you ...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...能，是linux unix下的一个强大编程工具。
目录：
1. awk简介
2. awk命令格式和选项
2.1. awk的语法有两种形式
2.2. 命令选项
3. 模式和操作
3.1. 模式
3.2. 操作
4. aw...
Checking if a string can be converted to float in Python
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What does value & 0xff do in Java?
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173
It sets result to the (unsigned) value resulting from putting the 8 bits of value in the lowes...
Creating a new column based on if-elif-else condition
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To formalize some of the approaches laid out above:
Create a function that operates on the ro...
What does ~~ (“double tilde”) do in Javascript?
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It removes everything after the decimal point because the bitwise operators implicitly convert t...
Removing leading zeroes from a field in a SQL statement
...ove the leading zeroes from a particular field, which is a simple VARCHAR(10) field. So, for example, if the field contains '00001A', the SELECT statement needs to return the data as '1A'.
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Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
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13 Answers
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Is there a splice method for strings?
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10 Answers
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Gem::LoadError for mysql2 gem, but it's already in Gemfile
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14 Answers
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