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Hidden Features of Xcode
...tween autocompletion choices.
Control ⌃. (Control-Period) after a word automatically accepts the first choice from the autocompletion menu. Try typing log then Control ⌃. and you'll get a nice NSLog statement. Press it again to cycle through any choices. To see all the mutable choices, t...
Reserved keywords in JavaScript
What JavaScript keywords (function names, variables, etc) are reserved?
8 Answers
8
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What is the difference between map and flatMap and a good use case for each?
... Array("Roses", "are", "red", "Violets", "are", "blue")
We have multiple words per line, and multiple lines, but we end up with a single output array of words
Just to illustrate that, flatMapping from a collection of lines to a collection of words looks like:
["aa bb cc", "", "dd"] => [["aa",...
How do you do relative time in Rails?
...
Sounds like you're looking for the time_ago_in_words method (or distance_of_time_in_words), from ActiveSupport. Call it like this:
<%= time_ago_in_words(timestamp) %>
share
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How do I clear/delete the current line in terminal?
... Ctrl+U to clear up to the beginning.
You can use Ctrl+W to delete just a word.
You can also use Ctrl+C to cancel.
If you want to keep the history, you can use Alt+Shift+# to make it a comment.
Bash Emacs Editing Mode Cheat Sheet
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How does “cat
...ell to read input from
the current source until a line
containing only word (with no trailing
blanks) is seen.
All of the lines read up to that point are then used as the
standard input for a command.
The format of here-documents is:
<<[-]word
h...
Convert all first letter to upper case, rest lower for each word
I have a string of text (about 5-6 words mostly) that I need to convert.
11 Answers
11...
Why do Java programmers like to name a variable “clazz”? [closed]
...? Is this some kind of convention ? I think 'clazz' is not even an English word , has no meaning at all , how can so many programmers name a wrong name coincidentally ?
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How to negate specific word in regex? [duplicate]
...r] but I need a regular expression where negation applies to the specific word - so in my example how do I negate an actual bar , and not "any chars in bar"?
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...k.AttachDispatch(m_Books.Add(varPath));
//利用模板文件建立新文档
m_Books.AttachDispatch(m_app.get_Workbooks(),true);
//LPDISPATCH lpDis = NULL;
m_lpDisp = m_Books.Add(COleVariant(file_name));
if (m_lpDisp)
{
m_Book.AttachDispatch(m_lpDisp);
//得到Worksheets
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