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How to subtract 2 hours from user's local time?
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Subtract from another date object
var d = new Date();
d.setHours(d.getHours() - 2);
Complete reference list for Date object
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Ruby / Rails: convert int to time OR get time from integer?
...w time object with the given number of seconds (and optional microseconds) from epoch.
API links
ruby-doc.org/core/classes/Time
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Deleting elements from std::set while iterating
...ementation is buggy or there is yet another requirement that prevents this from working on deque. The STL spec is so convoluted that you can't expect all implementations to follow it, let alone your casual programmer to memorize it. STL is a monster beyond taming, and since there is no unique implem...
Commands executed from vim are not recognizing bash command aliases
...~/.zshenv for all shells, so I moved my alias setup there and it now works from within Vim. See man zsh (or your shell's man pages) for more.
– Nathan Long
Feb 8 '14 at 22:52
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In C#, how can I create a TextReader object from a string (without writing to disk)
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StringReader is a TextReader (StreamReader is too, but for reading from streams). So taking your first example and just using it to construct the CsvReader rather than trying to construct a StreamReader from it first gives:
TextReader sr = new StringReader(TextBox_StartData.Text);
using(Csv...
Rails ActionMailer - format sender and recipient name/email address
...ully validate or escape the name and email, you can end up with an invalid From header by simply concatenating strings. Here is a safe way:
require 'mail'
address = Mail::Address.new email # ex: "john@example.com"
address.display_name = name.dup # ex: "John Doe"
# Set the From or Reply-To header ...
Asking the user for input until they give a valid response
I am writing a program that accepts an input from the user.
21 Answers
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Iterating through a JSON object
...ortunately it's a little hard to explain all the ways you can extract data from lists and dictionaries and strings in the 600 characters you can put in a comment. I already said you should index the dict to get at the value associated with a key. I'm not sure what you want to iterate over. Learning ...
The purpose of Model View Projection Matrix
...odel, view and projection matrices are three separate matrices. Model maps from an object's local coordinate space into world space, view from world space to camera space, projection from camera to screen.
If you compose all three, you can use the one result to map all the way from object space to ...
How to git log from all branches for the author at once?
...r command is right, since you use the --all switch which gives all commits from all branches. To answer the question in your comment, it works also in bare repositories.
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