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how to use sed, awk, or gawk to print only what is matched?
I see lots of examples and man pages on how to do things like search-and-replace using sed, awk, or gawk.
11 Answers
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How to convert a String into an ArrayList?
In my String, I can have an arbitrary number of words which are comma separated. I wanted each word added into an ArrayList. E.g.:
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What is “2's Complement”?
I'm in a computer systems course and have been struggling , in part, with Two's Complement . I want to understand it but everything I've read hasn't brought the picture together for me. I've read the wikipedia article and various other articles, including my text book .
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Ruby: How to get the first character of a string
How can I get the first character in a string using Ruby?
13 Answers
13
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Get Slightly Lighter and Darker Color from UIColor
I was looking to be able to turn any UIColor into a gradient. The way I am intending to do this is by using Core Graphics to draw a gradient. What I am trying to do is to get a color, lets say:
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How do I get the row count of a pandas DataFrame?
I'm trying to get the number of rows of dataframe df with Pandas, and here is my code.
14 Answers
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Are members of a C++ struct initialized to 0 by default?
I have this struct :
8 Answers
8
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Remove everything after a certain character
Is there a way to remove everything after a certain character or just choose everything up to that character? I'm getting the value from an href and up to the "?", and it's always going to be a different amount of characters.
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C++ convert from 1 char to string? [closed]
I need to cast only 1 char to string . The opposite way is pretty simple like str[0] .
2 Answers
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%d,%c,%s,%x等转换符 释义 - C/C++ - 清泛IT论坛，有思想、有深度
...六进制整数0f(0F) e.g. 0x1234
%p 指针
%s 字符串 %S Unicode字符串（双字节）
%% "%"
2．标志
左对齐："-" e.g. "%-20s"
右对齐："+" e.g. "%+20s"
空格：若符号为正...