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How to have conditional elements and keep DRY with Facebook React's JSX?
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Just leave banner as being undefined and it does not get included.
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Postgres: How to do Composite keys?
I cannot understand the syntax error in creating a composite key. It may be a logic error, because I have tested many varieties.
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PHP Session Fixation / Hijacking
I'm trying to understand more about PHP Session Fixation and hijacking and how to prevent these problems. I've been reading the following two articles on Chris Shiflett's website:
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ThreadStart with parameters
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You can use lambda expressions
private void MyMethod(string param1,int param2)
{
//do stuff
}
Thread myNewThread = new Thread(() => MyMethod("param1",5));
myNewThread.Start();
this is so far the best answer i could find, it's fast and easy.
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How to determine a Python variable's type?
... whole list of information about the object including the type and the doc string for the type.
e.g.
In [9]: var = 123
In [10]: var?
Type: int
Base Class: <type 'int'>
String Form: 123
Namespace: Interactive
Docstring:
int(x[, base]) -> integer
Convert a string or number ...
How should I have explained the difference between an Interface and an Abstract class?
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I will give you an example first:
public interface LoginAuth{
public String encryptPassword(String pass);
public void checkDBforUser();
}
Suppose you have 3 databases in your application. Then each and every implementation for that database needs to define the above 2 methods:
public cl...
Insert multiple rows WITHOUT repeating the “INSERT INTO …” part of the statement?
I know I've done this before years ago, but I can't remember the syntax, and I can't find it anywhere due to pulling up tons of help docs and articles about "bulk imports".
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How do I negate a test with regular expressions in a bash script?
... Another reason to use this form it that it won't accidentally match substrings (e.g. fail to add "/bin" to the path because "/usr/bin" is already there).
– Gordon Davisson
Dec 28 '10 at 0:54
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How to Store Historical Data
Some co-workers and I got into a debate on the best way to store historical data. Currently, for some systems, I use a separate table to store historical data, and I keep an original table for the current, active record. So, let's say I have table FOO. Under my system, all active records will go ...
Read file from line 2 or skip header row
...oordinates.txt
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Name,Longitude,Latitude,Elevation, Comments
String, Decimal Deg., Decimal Deg., Meters, String
Euler's Town,7.58857,47.559537,0, "Blah"
Faneuil Hall,-71.054773,42.360217,0
Yellowstone National Park,-110.588455,44.427963,0
Then method extraction allows you to specify ...