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Difference between left join and right join in SQL Server [duplicate]
...ft join Table1 (or its identical pair, Table1 right join Table2) to see a difference. This query should give you more rows, since Table2 contains a row with an id which is not present in Table1.
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.htaccess - how to force “www.” in a generic way?
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This solution works only if you want all sub-domains forwarded to www.yourdomain.com. If you only want to force www, you should update the second line to be: RewriteCond %{HTTP_HOST} ^yourdomain.com [NC]
– Jared Pomranky
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What is the difference between graph search and tree search?
What is the difference between graph search and tree search versions regarding DFS, A* searches in artificial intelligence ?
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How to display long messages in logcat
I am trying to display long message on logcat. If the length of message is more than 1000 characters, it gets broken.
10 A...
Append value to empty vector in R?
...abits). ;-)
Note that vector <- c() isn't an empty vector; it's NULL. If you want an empty character vector, use vector <- character().
Pre-allocate the vector before looping
If you absolutely must use a for loop, you should pre-allocate the entire vector before the loop. This will be muc...
How to efficiently count the number of keys/properties of an object in JavaScript?
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-1 (-200 if I could) This not only iterates through the object but also creates a whole new array with all its keys, so it completely fails at answering the question.
– GetFree
Jun 22 '12 at 14:2...
Foreign Key to multiple tables
... This is also what we have in our software and I would avoid if you are trying to create a generic data access framework. This design will increase complexity in the app layer.
– Frank.Germain
May 12 '17 at 16:53
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Check whether an input string contains a number in javascript
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If I'm not mistaken, the question requires "contains number", not "is number". So:
function hasNumber(myString) {
return /\d/.test(myString);
}
s...
Add a CSS class to
...utton here', :class => 'submit_class_name_here' %>
This should do. If you're getting an error, chances are that you're not supplying the name.
Alternatively, you can style the button without a class:
form#form_id_here input[type=submit]
Try that, as well.
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What are the underlying data structures used for Redis?
...ur question, but I'll start with something that may look strange at first: if you are not interested in Redis internals you should not care about how data types are implemented internally. This is for a simple reason: for every Redis operation you'll find the time complexity in the documentation and...