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If isset $_POST
...nderstand why it always says that it is set, even if I send an empty form. What is missing or wrong?
15 Answers
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How to generate and validate a software license key?
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Simple answer - No matter what scheme you use it can be cracked.
Don't punish honest customers with a system meant to prevent hackers, as hackers will crack it regardless.
A simple hashed code tied to their email or similar is probably good enough. ...
Struct constructor: “fields must be fully assigned before control is returned to the caller.”
... @joshua.ewer, @vittore - you are always allowed to call that constructor, what you aren't allowed to do is to give your own implementation, but must always go with the default given to you (which assigns default(AppropriateType) to all instance fields).
– Jon Hanna
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is node.js' console.log asynchronous?
....6 this post is obsolete, since stdout is synchronous now.
Well let's see what console.log actually does.
First of all it's part of the console module:
exports.log = function() {
process.stdout.write(format.apply(this, arguments) + '\n');
};
So it simply does some formatting and writes to pro...
Extracting specific columns in numpy array
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What is this syntax called?
– Burrito
Jul 3 at 14:51
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show 1 mor...
How to increment a NSNumber
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sorry, what does the ... stand for? Thats a pseudo-code reference right? XCode doesn't ...
– boulder_ruby
Feb 23 '14 at 1:11
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Pandas count(distinct) equivalent
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I believe this is what you want:
table.groupby('YEARMONTH').CLIENTCODE.nunique()
Example:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4...
How to create and use resources in .NET
...:
In my case, I want to create an icon. It's a similar process, no matter what type of data you want to add as a resource though.
Right click the project you want to add a resource to. Do this in the Solution Explorer. Select the "Properties" option from the list.
Click the "Resources" tab.
The f...
How to reset a single table in rails?
...is answer solved the question of the majority users who reached it. That's what really matters. Besides that, It's not the only answer and it's not flagged as the correct one. The author also explained his intention. So I don't see any problem.
– Edison Machado
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send mail from linux terminal in one line [closed]
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mail can represent quite a couple of programs on a linux system. What you want behind it is either sendmail or postfix. I recommend the latter.
You can install it via your favorite package manager. Then you have to configure it, and once you have done that, you can send email like this:
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