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Cost of exception handlers in Python
...faster than an explicit if as long as the condition is not met.
But it's all within the same order of magnitude and unlikely to matter either way. Only if the condition is actually met, then the if version is significantly faster.
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Limiting floats to two decimal points
...
You are running into the old problem with floating point numbers that not all numbers can be represented exactly. The command line is just showing you the full floating point form from memory.
With floating point representation, your rounded version is the same number. Since computers are binary, ...
Benefits of EBS vs. instance-store (and vice-versa) [closed]
...re's why
EBS backed instances can be set so that they cannot be (accidentally) terminated through the API.
EBS backed instances can be stopped when you're not using them and resumed when you need them again (like pausing a Virtual PC), at least with my usage patterns saving much more money than I ...
The Role Manager feature has not been enabled
...tried putting it in Application_Start and it says This method can only be called during the application's pre-start initialization phase.
– Maslow
May 8 '13 at 15:17
1
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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...T(field) or COUNT(*), and stick with it consistently, and if your database allows COUNT(tableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those rare cases is equivalent to count(*)
Use count(*) fo...
Fixed Table Cell Width
...
You could try using the <col> tag manage table styling for all rows but you will need to set the table-layout:fixed style on the <table> or the tables css class and set the overflow style for the cells
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/col
<table cl...
Serialize an object to string
...(T) in XmlSerializer constructor: if you use the first one the code covers all possible subclasses of T (which are valid for the method), while using the latter one will fail when passing a type derived from T.
Here is a link with some example code that motivate this statement, with XmlSerializ...
Can I apply a CSS style to an element name?
...ute selectors: http://www.css3.info/preview/attribute-selectors/
/* turns all input fields that have a name that starts with "go" red */
input[name^="go"] { color: red }
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GoTo Next Iteration in For Loop in java
...ion in nested loops use continue someLabel;, but you can also combine them all.
outerLoop:
for(int j = 0; j < 10; j++){
innerLoop:
for(int i = 0; i < 10; i++){
if (i + j == 2){
continue innerLoop;
}
if (i + j == 4){
continue outerLoop;
...
Spring 3.0 - Unable to locate Spring NamespaceHandler for XML schema namespace [http://www.springfra
...y configuration xml can be a different one from applicationContext.xml, usually applicationContext-security.xml inside WEB-INF folder. The changes to be applied are for web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-...