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How do I check OS with a preprocessor directive?
...und:
Windows
_WIN32 Both 32 bit and 64 bit
_WIN64 64 bit only
Unix (Linux, *BSD, Mac OS X)
See this related question on some of the pitfalls of using this check.
unix
__unix
__unix__
Mac OS X
__APPLE__
__MACH__
Both are defined; checking for either should work.
Linux
__linux__
li...
Remove carriage return in Unix
...is the simplest way to remove all the carriage returns \r from a file in Unix?
20 Answers
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Can not connect to local PostgreSQL
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This really looks like a file permissions error. Unix domain sockets are files and have user permissions just like any other. It looks as though the OSX user attempting to access the database does not have file permissions to access the socket file. To confirm this I've d...
Finding the number of days between two dates
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Convert your dates to unix timestamps, then substract one from the another. That will give you the difference in seconds, which you divide by 86400 (amount of seconds in a day) to give you an approximate amount of days in that range.
If your date...
How do you convert epoch time in C#?
How do you convert Unix epoch time into real time in C#? (Epoch beginning 1/1/1970)
14 Answers
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EOL conversion in notepad ++
For some reason, when I open files from a unix server on my windows machine, they occasionally have Macintosh EOL conversion, and when I edit/save them again they don't work properly on the unix server. I only use notepad ++ to edit files from this unix server, so is there a way to create a macro t...
Should MySQL have its timezone set to UTC?
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It will return 02:00:00 if your timezone is +2:00.
To get the current UNIX timestamp (in seconds):
SELECT UNIX_TIMESTAMP(NOW());
SELECT UNIX_TIMESTAMP();
To get the timestamp column as a UNIX timestamp
SELECT UNIX_TIMESTAMP(`timestamp`) FROM `table_name`
To get a UTC datetime column as a ...
How to sort the files according to the time stamp in unix? [closed]
How to sort the files according to the time stamp in unix?
I need to sort the files and also based on time they created.
2 ...
How to get time in milliseconds since the unix epoch in Javascript? [duplicate]
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Date.now() returns a unix timestamp in milliseconds.
const now = Date.now(); // Unix timestamp in milliseconds
console.log( now );
Prior to ECMAScript5 (I.E. Internet Explorer 8 and older) you needed to construct a Date object, from ...
How to convert timestamp to datetime in MySQL?
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Use the FROM_UNIXTIME() function in MySQL
Remember that if you are using a framework that stores it in milliseconds (for example Java's timestamp) you have to divide by 1000 to obtain the right Unix time in seconds.
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