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Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
...never be modified again. It will however, be accessed (via get(key) only) from multiple threads. Is it safe to use a java.util.HashMap in this way?
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How do I subtract minutes from a date in javascript?
...is pseudo code into working js [don't worry about where the end date comes from except that it's a valid javascript date].
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What is object slicing?
...ven't! You have copied a part of b1 to b2 (the part of b1 that B inherited from A), and left the other parts of b2 unchanged. b2 is now a frankensteinian creature consisting of a few bits of b1 followed by some chunks of b2. Ugh! Downvoting because I think the answer is very missleading.
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How to read a text file reversely with iterator in C#
...a large file, around 400K lines and 200 M. But sometimes I have to process from bottom up. How can I use iterator (yield return) here? Basically I don't like to load everything in memory. I know it is more efficient to use iterator in .NET.
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Converting Epoch time into the datetime
I am getting a response from the rest is an Epoch time format like
8 Answers
8
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How to upgrade PowerShell version from 2.0 to 3.0
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Download and install from http://www.microsoft.com/en-us/download/details.aspx?id=34595. You need Windows 7 SP1 though.
It's worth keeping in mind that PowerShell 3 on Windows 7 does not have all the cmdlets as PowerShell 3 on Windows 8. So you...
How can I tell if one commit is a descendant of another commit?
...t merge-base A B is equal to git rev-parse --verify A (then A is reachable from B), or if it is git rev-parse --verify B (then B is reachable from A). git rev-parse is here needed to convert from commit name to commit SHA-1 / commit id.
Using git rev-list like in VonC answer is also possibility.
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Undo a merge by pull request?
...d that it merged in a bunch of commits. So now there are all these commits from this person from days before the merge. How do you undo this?
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How do you return a JSON object from a Java Servlet
...response.setContentType("application/json");
// Get the printwriter object from response to write the required json object to the output stream
PrintWriter out = response.getWriter();
// Assuming your json object is **jsonObject**, perform the following, it will return your json object
out.p...
Extracting the last n characters from a string in R
How can I get the last n characters from a string in R?
Is there a function like SQL's RIGHT?
15 Answers
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