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In mongoDb, how do you remove an array element by its index?
...quires that your dictionary be strictly ordered. The dictionaries in most languages are unordered, so it can be a pain to make this happen.
– Glenn Maynard
Jul 15 '13 at 21:34
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Where can I set environment variables that crontab will use?
...bles in the crontab itself when running crontab -e from the command line.
LANG=nb_NO.UTF-8
LC_ALL=nb_NO.UTF-8
# m h dom mon dow command
* * * * * sleep 5s && echo "yo"
This feature is only available to certain implementations of cron. Ubuntu and Debian currently use vixie-cron which ...
What is the meaning of addToBackStack with null parameter?
....android.com/reference/android/app/FragmentTransaction.html#addToBackStack(java.lang.String)
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LINQ Single vs First
...nt question.
Take, for example, a table that stores Customers in different languages using a Composite Key ( ID, Lang ):
DBContext db = new DBContext();
Customer customer = db.Customers.Where( c=> c.ID == 5 ).First();
This code above introduces a possible logic error ( difficult to trace ). It w...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
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部分修改选项的说明：
SYS_CONFIG = /var/www/extman/
SYS_LANGDIR = /var/www/extman/lang
SYS_TEMPLDIR = /var/www/extman/html
SYS_MAILDIR_BASE = /home/domains
此处即为您在前文所设置的用户邮件的存放目录，可改作：
SYS_MAILDIR_BASE = /var/mailbox
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How do I put a clear button inside my HTML text input box like the iPhone does?
...s an SSCCE, you can copy'n'paste'n'run it:
<!DOCTYPE html>
<html lang="en">
<head>
<title>SO question 2803532</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(document).read...
Expand div to max width when float:left is set
...k at this: http://jsfiddle.net/EAEKc/
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Content with Menu</title>
<style>
.content .left {
float: left;
width: 100px;
background-color: green;
...
How to create default value for function argument in Clojure
...recur only works on the same arity. if you tried recur above, for example: java.lang.IllegalArgumentException: Mismatched argument count to recur, expected: 1 args, got: 2, compiling:
– djhaskin987
Aug 20 '14 at 13:16
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Using Sass Variables with CSS3 Media Queries
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+1 love this solution. Combine this with a map (sass-lang.com/documentation/functions/map) and you've got some power - I'll make a separate solution here to explain. Edit: done. stackoverflow.com/a/56894640/385273
– Ben
Jul 4 '19 at 22:06
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How is Racket different from Scheme?
...t does have the more restricted letrec -- for example, the one in the r5rs language; it's an intentional choice to use the letrec*-like version in the default language.
– Eli Barzilay
Jul 31 '10 at 15:57
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