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Remove duplicate rows in MySQL
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A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the d...
LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
... result in at most a single result. On the other hand, when FirstOrDefault is used, the query can return any amount of results but you state that you only want the first one.
I personally find the semantics very different and using the appropriate one, depending on the expected results, improves re...
Unix shell script find out which directory the script file resides?
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In Bash, you should get what you need like this:
#!/usr/bin/env bash
BASEDIR=$(dirname "$0")
echo "$BASEDIR"
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Get the IP address of the machine
This Question is almost the same as the previously asked Get the IP Address of local computer -Question. However I need to find the IP address(es) of a Linux Machine .
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Is it true that one should not use NSLog() on production code?
I was told this a few times in this very site, but I wanted to make sure this is really the case.
12 Answers
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jQuery autocomplete tagging plug-in like StackOverflow's input tags? [closed]
What solutions accomplish the same auto-completion that SO uses for entering tags?
6 Answers
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DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
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This is what postgres does when a query produces an error and you try to run another query without first rolling back the transaction. (You might think of it as a safety feature, to keep you from corrupting your data.)
To fix...
How to find out which package version is loaded in R?
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You can use sessionInfo() to accomplish that.
> sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5]...
Web Application Problems (web.config errors) HTTP 500.19 with IIS7.5 and ASP.NET v2
This is driving the whole team crazy. There must be some simple mis-configured part of IIS or our Web Server, but every time we try to run out ASP.NET Web Application on IIS 7.5 we get the following error...
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How to convert an int to string in C?
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EDIT: As pointed out in the comment, itoa() is not a standard, so better use sprintf() approach suggested in the rivaling answer!
You can use itoa() function to convert your integer value to a string.
Here is an example:
int num = 321;
char snum[5];
// convert 12...