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How do I replace a character at a particular index in JavaScript?
I have a string, let's say Hello world and I need to replace the char at index 3. How can I replace a char by specifying a index?
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Regular expression for floating point numbers
...al numbers, such as hex and octal, see my answer to How do I identify if a string is a number?.
If you want to validate that an input is a number (rather than finding a number within the input), then you should surround the pattern with ^ and $, like so:
^[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)$
Irr...
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...器。到了机器后再按照天或者半天分表，比如表名为 weibo_2013020101 、weibo_2013020112。weibo_2013020101表示2月1日上午一个表，weibo_2013020112表示2月1日下午一个表。光这样分了还是不够，1000w/2=500w，经不起压力扩展。我们还需要把表再...
Override valueof() and toString() in Java enum
... have spaces in their values so it's all bunched up. I want to override toString() to add these spaces where I tell it to.
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Rails 3 execute custom sql query without a model
I need to write a standalone ruby script that is supposed to deal with database. I used code given below in rails 3
5 Answe...
Installing PIL with pip
I am trying to install PIL (the Python Imaging Library) using the command:
21 Answers
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force Maven to copy dependencies into target/lib
...tions>
<execution>
<phase>install</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${proj...
django: BooleanField, how to set the default value to true?
...lay. This value
is not used as a fallback if data isn't given.
And if you dig into the code of form validation process, you will find that, for each fields, form will call it's widget's value_from_datadict to get actual value, so this is the place where we can inject default value.
To d...
Improving bulk insert performance in Entity framework [duplicate]
...ction;
conn.Open();
Type t = typeof(T);
Set(t).ToString();
var objectContext = ((IObjectContextAdapter)this).ObjectContext;
var workspace = objectContext.MetadataWorkspace;
var mappings = GetMappings(workspace, objectContext.DefaultContainerName, typ...
How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class?
...
Easy:
Create interface class, where String output is optional, or can be whatever variables you want to return.
public interface AsyncResponse {
void processFinish(String output);
}
Go to your AsyncTask class, and declare interface AsyncResponse as a fie...