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How to Create Deterministic Guids
...
This will convert any string into a Guid without having to import an outside assembly.
public static Guid ToGuid(string src)
{
byte[] stringbytes = Encoding.UTF8.GetBytes(src);
byte[] hashedBytes = new System.Security.Cryptogr...
How to make input type= file Should accept only pdf and xls
...eader();
fileReader.onload = function(e) {
var int32View = new Uint8Array(e.target.result);
//verify the magic number
// for JPG is 0xFF 0xD8 0xFF 0xE0 (see https://en.wikipedia.org/wiki/List_of_file_signatures)
if(int32View...
Can you do greater than comparison on a date in a Rails 3 search?
... > ?", p[:date]).
order('date ASC, created_at ASC')
or you can also convert everything into the SQL notation
Note.
where("user_id = ? AND notetype = ? AND date > ?", current_user.id, p[:note_type], p[:date]).
order('date ASC, created_at ASC')
...
Ant: How to execute a command for each file in directory?
...is evil; write a custom ant task.
ant-contrib is evil because it tries to convert ant from a declarative style to an imperative style. But xml makes a crap programming language.
By contrast a custom ant task allows you to write in a real language (Java), with a real IDE, where you can write unit t...
What is InputStream & Output Stream? Why and when do we use them?
...tters is that you receive information from the stream (or send information into that stream.)
InputStream is used for many things that you read from.
OutputStream is used for many things that you write to.
Here's some sample code. It assumes the InputStream instr and OutputStream osstr have alrea...
When to use wrapper class and primitive type
...is:
It can be handy to initialize Objects to null or send null parameters into a method/constructor to indicate state or function. This can't be done with primitives.
Many programmers initialize numbers to 0 (default) or -1 to signify this, but depending on the scenario, this may be incorrect or m...
Web API Put Request generates an Http 405 Method Not Allowed error
...tions can't bind data to primitive type parameters. I had to change public int PutFluffColor(int Id, int colorCode) to public int PutFluffColor(int Id, UpdateFluffColorModel model)
– Josh Noe
May 1 '15 at 17:31
...
Android. Fragment getActivity() sometimes returns null
...e application works good without forcecloses, however some users get NullPointerException in fragment class when the getActivity() method is called.
...
How do I print the full value of a long string in gdb?
...
When I try this I only get: "Value can't be converted to integer."
– Philipp Ludwig
Jan 28 '19 at 12:57
3
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How do I detect what .NET Framework versions and service packs are installed?
... {
if (parentKey != null)
{
string installed = Convert.ToString(parentKey.GetValue("Install"));
if (installed == "1")
{
string version = Convert.ToString(parentKey.GetValue("Version"));
if (string.IsNullOrEmpty(versi...