The difference between fork(), vfork(), exec() and clone()
I was looking to find the difference between these four on Google and I expected there to be a huge amount of information on this, but there really wasn't any solid comparison between the four calls. ...
Get Enum from Description attribute
> [Finding an enum value by its Description Attribute](https://stackoverflow.com/questions/3422407/finding-an-enum-value-by-its-description-attribute) I have a generic extension method which g...
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- 23 May at 12:18
Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.sock) in
I'm trying to connect to my MySQL DB with the Terminal on my Apple (With PHP). Yesterday it worked fine, and now I suddenly get the error in the title. The script works when I use my browser to run ...
Viewing all `git diffs` with vimdiff
I setup `git diff` to wrap into vimdiff, using "[Git Diff with Vimdiff](http://technotales.wordpress.com/2009/05/17/git-diff-with-vimdiff/)" as a guide, and it's working as expected unless there are m...
Only get hash value using md5sum (without filename)
I use [md5sum](https://linux.die.net/man/1/md5sum) to generate a hash value for a file. But I only need to receive the hash value, not the file name. ``` md5=`md5sum ${my_iso_file}` echo ${md5} ``` O...
Remove insignificant trailing zeros from a number?
Have I missed a standard API call that removes trailing insignificant zeros from a number? ``` var x = 1.234000; // to become 1.234 var y = 1.234001; // stays 1.234001 ``` `Number.toFixed()` and `Num...
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- 22 Sep at 07:42
Scoping in Python 'for' loops
I'm not asking about Python's scoping rules; I understand generally scoping works in Python for loops. My question is the design decisions were made in this way. For example (no pun intended): ``` ...
How to remove all white space from the beginning or end of a string?
How can I remove all white space from the beginning and end of a string? Like so: `"hello"` returns `"hello"` `"hello "` returns `"hello"` `" hello "` returns `"hello"` `" hello world "` returns `"h...
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- 27 Jun at 14:30
How can I get the line number which threw exception?
In a `catch` block, how can I get the line number which threw an exception?
MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query
I have a SQL query where I want to insert multiple rows in single query. so I used something like: ``` $sql = "INSERT INTO beautiful (name, age) VALUES ('Helen', 24), ('Katrina', 21), ('Samia...
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- 17 May at 21:47
Make UINavigationBar transparent
How do you make a ? Though I want its bar items to remain visible.
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- 25 Dec at 13:7
How to change the Push and Pop animations in a navigation based app
I have a navigation based application and I want to change the animation of the push and pop animations. How would I do that? There have been many answers to this question and it's been quite awhil...
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- 16 Nov at 17:39
Is it possible to listen to a "style change" event?
Is it possible to create an event listener in jQuery that can be bound to any style changes? For example, if I want to "do" something when an element changes dimensions, or any other changes in the st...
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- 19 Aug at 13:1
How to break nested loops in JavaScript?
I tried this: ``` for(i = 0; i < 5; i++){ for(j = i + 1; j < 5; j++){ break(2); } alert(1); } ``` only to get: > `SyntaxError`: missing `;` before statement So, how would I br...
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- 2 Mar at 13:43
How do I create a DataTable, then add rows to it?
I've tried creating a `DataTable` and adding rows to it like this: ``` DataTable dt = new DataTable(); dt.clear(); dt.Columns.Add("Name"); dt.Columns.Add("Marks"); ``` How do I see the structure o...
Split string, convert ToList<int>() in one line
I have a string that has numbers ``` string sNumbers = "1,2,3,4,5"; ``` I can split it then convert it to `List<int>` ``` sNumbers.Split( new[] { ',' } ).ToList<int>(); ``` How can I convert str...
What is the best Java email address validation method?
What are the good email address validation libraries for Java? Are there any alternatives to [commons validator](http://commons.apache.org/proper/commons-validator/apidocs/org/apache/commons/validato...
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- 29 Jun at 14:14
Performance of Arrays vs. Lists
Say you need to have a list/array of integers which you need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume pro...
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- 28 Jun at 08:43
How to build query string with Javascript
Just wondering if there is anything built-in to Javascript that can take a Form and return the query parameters, eg: `"var1=value&var2=value2&arr[]=foo&arr[]=bar..."` I've been wondering this for yea...
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- 13 May at 15:54
BindingFlags.IgnoreCase not working for Type.GetProperty()?
Imagine the following A type T has a field Company. When executing the following method it works perfectly: ``` Type t = typeof(T); t.GetProperty("Company") ``` Whith the following call I get null...
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- 5 Nov at 10:5
What's the best way to check if a String represents an integer in Java?
I normally use the following idiom to check if a String can be converted to an integer. ``` public boolean isInteger( String input ) { try { Integer.parseInt( input ); return true...
Advantages to Using Private Static Methods
When creating a class that has internal private methods, usually to reduce code duplication, that don't require the use of any instance fields, are there performance or memory advantages to declaring ...
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- 26 Oct at 22:37
How to implement WiX installer upgrade?
At work we use [WiX](http://en.wikipedia.org/wiki/WiX) for building installation packages. We want that installation of product X would result in uninstall of the previous version of that product on t...
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- 31 Jan at 01:15
What are the main performance differences between varchar and nvarchar SQL Server data types?
I'm working on a database for a small web app at my school using `SQL Server 2005`. I see a couple of schools of thought on the issue of `varchar` vs `nvarchar`: 1. Use varchar unless you deal with ...
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- 27 Jun at 22:34
DeprecationWarning: Buffer() is deprecated due to security and usability issues when I move my script to another server
Getting error when script move to other server. > (node:15707) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocU...