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Use email address as primary key?
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In case any one wonders, as I did, a GUID key would be equivalent to an email key I think.
– tofutim
Feb 12 '16 at 19:07
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How many random elements before MD5 produces collisions?
...:
md5(filename + timestamp)
If the former, you are most of the way to a GUID, and I wouldn't worry about it.
If the latter, then see Karg's post about how you will run into collisions eventually.
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Comparing object properties in c# [closed]
...of(DateTimeOffset),
typeof(TimeSpan),
typeof(Guid)
}.Contains(type) ||
(Convert.GetTypeCode(type) != TypeCode.Object);
}
public static Type GetUnderlyingType(this MemberInfo member)
{
switch (member.MemberType)
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Rails: How to reference images in CSS within Rails 4
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The hash is because the asset pipeline and server Optimize caching
http://guides.rubyonrails.org/asset_pipeline.html
Try something like this:
background-image: url(image_path('check.png'));
Goodluck
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How to get current memory usage in android?
... amount of memory used to cache file data and metadata.
A far more useful guide to free memory on a Linux system is the free(1) command; on my desktop, it reports information like this:
$ free -m
total used free shared buffers cached
Mem: 5980 10...
What is the difference between JavaScript and ECMAScript?
...t.
Before Netscape went down, they decided to start a standard that would guide the path of JavaScript, named ECMAScript.
ECMAScript had a few releases and in 1999 they released their last version (ECMAScript 3) before they went into hibernation for the next 10 years. During this 10 years, Micros...
Do I have to guard against SQL injection if I used a dropdown?
...where they aren't applicable and what to do in such case: The Hitchhiker's Guide to SQL Injection protection
Also, this question was tagged with mysqli. Mostly by accident, I presume, but anyway, I have to warn you that raw mysqli is not an adequate substitution for the old mysq_* functions. Simply...
Why do we always prefer using parameters in SQL statements?
...rocedure and sql injections.
Also read Protect from sql injection it will guide how you can protect your database.
Hope it help you to understand also any question comment me.
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Strings are objects in Java, so why don't we use 'new' to create them?
... Java changed it.
This FAQ talks about it briefly. The Java Specification guide talks about it also. But I can't find it online.
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Difference between API and ABI
...mpatible yet ABI-compatible change docs.oracle.com/javase/7/docs/technotes/guides/language/… .
– Pacerier
Aug 27 '14 at 4:24
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