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What is a stack trace, and how can I use it to debug my application errors?
Sometimes when I run my application it gives me an error that looks like:
7 Answers
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What is your most productive shortcut with Vim?
... any other editor.
I'm using Vim to do some basic stuff and I'm at best 10 times less productive with Vim.
50 Answers
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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
...ch [] call is just the default value, which we’ve been mutating all this time so now contains our new values. Since << doesn’t assign to the hash (there can never be assignment in Ruby without an = present†), we’ve never put anything into our actual hash. Instead we have to use <<...
Setting custom UITableViewCells height
...ns to using tableView:heightForRowAtIndexPath: instead of rowHeight. Every time a table view is displayed, it calls tableView:heightForRowAtIndexPath: on the delegate for each of its rows, which can result in a significant performance problem with table views having a large number of rows (approxima...
How to automatically add user account AND password with a Bash script?
... the variables.
The above command passes the password and a new line, two times, to passwd, which is what passwd requires.
If not using variables, I think this probably works.
echo -e 'password\npassword\n' | sudo passwd username
Single quotes should suffice here.
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Python regex find all overlapping matches?
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My answer is at least 2 times faster than this one. But this solution is tricky, I upvote it.
– eyquem
Jul 5 '13 at 10:33
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Mimicking sets in JavaScript?
...implemented now in some browsers. Since browser availability changes over time, you can look at the line for Set in this ES6 compatibility table to see the current status for browser availability.
One advantage of the built-in Set object is that it doesn't coerce all keys to a string like the Objec...
format date with moment.js
...tartDate)
The result is "Mon Jun 28 1920 00:00:00 GMT+0530 (India Standard Time)",
Then, when I use another format on "06/28/20": startDate = moment(startDate ).format('MM-DD-YYYY'); Result: 06-28-1920, in google chrome and firefox browsers it gives correct date on second attempt as: 06-28-2020. But...
Method chaining - why is it a good practice, or not?
...h accepted something like 10 parameters, and needed more, but for the most time you only had to specify a few. With overrides this became very cumbersome very fast. Instead I opted for the chaining approach:
MyObject.Start()
.SpecifySomeParameter(asdasd)
.SpecifySomeOtherParameter(asdasd)
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Hidden features of Windows batch files
...indows Explorer in the "some_directory" folder.
I have found this a great time-saver.
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answered Oct 29 '08 at 2:54
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