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How many database indexes is too many?
...that occur on the table.
If there's lots of SELECTs and very few changes, index all you like.... these will (potentially) speed the SELECT statements up.
If the table is heavily hit by UPDATEs, INSERTs + DELETEs ... these will be very slow with lots of indexes since they all need to be modified ea...
Tab Vs Space preferences in Vim
...reas with expandtab switched off, pressing the Tab key inserts a the smallest possible number of tab+space characters that matches softtabstop . (Please correct me if I'm wrong.)
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Maximum length of the textual representation of an IPv6 address?
I want to store the data returned by $_SERVER["REMOTE_ADDR"] in PHP into a DB field, pretty simple task, really. The problem is that I can't find any proper information about the maximum length of the textual representation of an IPv6 address, which is what a webserver provides through $_SERVER...
Eclipse returns error message “Java was started but returned exit code = 1”
...this as my jvm version is 1.6. From the doc http://help.eclipse.org/indigo/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fmisc%2Fruntime-options.html
osgi.requiredJavaVersion
The minimum java version that is required to launch Eclipse. The default value is "1.4.1".
I think my java...
Parse query string in JavaScript [duplicate]
...ne query value. I think a better abstraction is to return a JS object with all the name value pairs from the query string
– Juan Mendes
Sep 4 '12 at 23:37
11
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How to remove specific value from array using jQuery
...Array returns -1 if the value is not present and .splice treats a negative index as 'from the end' so if the value you're trying to remove is not present, some other value will be removed instead. Also $.grep will remove all occurrences whereas this method will only remove the first.
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When to add what indexes in a table in Rails
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Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will be c...
Why would I want stage before committing in Git?
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When you commit it's only going to commit the changes in the index (the "staged" files). There are many uses for this, but the most obvious is to break up your working changes into smaller, self-contained pieces. Perhaps you fixed a bug while you were implementing a feature. You can...
Why use the INCLUDE clause when creating an index?
While studying for the 70-433 exam I noticed you can create a covering index in one of the following two ways.
8 Answers
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Apache VirtualHost 403 Forbidden
...ache. You can see the enabling of the feature with the directive
Require all denied
This basically says to deny access to all users. To fix this problem, either remove the denied directive (or much better) add the following directive to the directories you want to grant access to:
Require all ...