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Validate that a string is a positive integer
... but if that results in a blank string, restores a single 0.
Number(str): Convert str to a number; the number may well have a fractional portion, or may be NaN.
Math.floor: Truncate the number (chops off any fractional portion).
String(...): Converts the result back into a normal decimal string. Fo...
How to access property of anonymous type in C#?
...ackground
As a starting point, I found a good answer here. The idea is to convert the anonymous data type into a dictionary by using reflection. The dictionary makes it easy to access the properties, since their names are stored as keys (you can access them like myDict["myProperty"]).
Inspired by ...
How to check whether a file is empty or not?
...s, just for fun.
>>> import os
>>> os.stat('c:/pagefile.sys').st_size==0
False
False means a non-empty file.
So let's write a function:
import os
def file_is_empty(path):
return os.stat(path).st_size==0
...
Capitalize first letter. MySQL
...s - if not, and you cant set up a temporary DB on your personal machine to convert your tables, then ask your shared hosting provider if they will set this function for you.
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What is that “total” in the very first line after ls -l? [closed]
...
Just to mention - you can use -h (ls -lh) to convert this in human readable format.
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How to detect user inactivity in Android
...ple instances of the Handler and Runnable for each Activity created. If we convert these two members to static, this will be avoided. Also, could you tell me why have you called stopDisconnectTimer() in onStop()?`
– Gaurav Bhor
Aug 27 '14 at 5:06
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Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
...llation on run this query:
select concat('ALTER TABLE ', t.table_name , ' CONVERT TO CHARACTER
SET utf8 COLLATE utf8_unicode_ci;') from (SELECT table_name FROM
information_schema.tables where table_schema='SCHRMA') t;
Storing SHA1 hash values in MySQL
...ong field.
So I recommend you to use BINARY(20) and the UNHEX function to convert the SHA1 value to binary.
I compared storage requirements for BINARY(20) and CHAR(40).
CREATE TABLE `binary` (
`id` int unsigned auto_increment primary key,
`password` binary(20) not null
);
CREATE TABLE `ch...
Read and parse a Json File in C#
...
string json = r.ReadToEnd();
List<Item> items = JsonConvert.DeserializeObject<List<Item>>(json);
}
}
public class Item
{
public int millis;
public string stamp;
public DateTime datetime;
public string light;
public float temp;
public fl...
Immutable array in Java
...his can actually come in handy if you are using the List.toArray method to convert a List to an array. Since even an empty array takes up some memory, you can save that memory allocation by creating a constant empty array, and always passing it to the toArray method. That method will allocate a new ...