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MongoDB with redis
...oDB does not have yet an expiration mechanism. Capped collections cannot really be used to implement a real TTL. Redis has a TTL-based expiration mechanism, making it convenient to store volatile data. For instance, user sessions are commonly stored in Redis, while user data will be stored and index...
Package cairo was not found in the pkg-config search path. Node j.s install canvas issue
I am having a problem installing installing the canvas module in node..It seems to be something with cairo I am getting this error...
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How to use a servlet filter in Java to change an incoming servlet request url?
... a check in the code if the URL needs to be changed and if not, then just call FilterChain#doFilter(), else it will call itself in an infinite loop.
Alternatively you can also just use an existing 3rd party API to do all the work for you, such as Tuckey's UrlRewriteFilter which can be configured th...
variable === undefined vs. typeof variable === “undefined”
...for comparison can throw an error whereas a typeof check never will.
For example, the following is used in IE for parsing XML:
var x = new ActiveXObject("Microsoft.XMLDOM");
To check whether it has a loadXML method safely:
typeof x.loadXML === "undefined"; // Returns false
On the other hand:
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Split a module across several files
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Rust's module system is actually incredibly flexible and will let you expose whatever kind of structure you want while hiding how your code is structured in files.
I think the key here is to make use of pub use, which will allow you to re-export identi...
How can I convert a comma-separated string to an array?
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Best practice for support all types of strings. See here stackoverflow.com/a/32657055/2632619
– Andi AR
Sep 18 '15 at 16:46
7
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Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
...atatype and something like decimal(19,4) (which is what money uses internally, I believe).
12 Answers
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How do I remove duplicate items from an array in Perl?
...is as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three
If you want to use a module, try the uniq function from List::MoreUtils
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How to pass parameters to ThreadStart method in Thread?
...ers, and you get compile-time checking without needing to cast from object all the time.
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How do you use the “WITH” clause in MySQL?
I am converting all my SQL Server queries to MySQL and my queries that have WITH in them are all failing. Here's an example:
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