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PG undefinedtable error relation users does not exist
...llowing:
rake db:reset
The rake db:reset task will drop the database and set it up again. This is functionally equivalent to rake db:drop db:setup.
This is not the same as running all the migrations. It will only use the
contents of the current schema.rb file. If a migration can't be ro...
How to escape double quotes in JSON
... within the quotation marks except for the characters that must be escaped and then it specifies: \" represents the quotation mark character (U+0022)
– mastazi
Mar 30 '17 at 1:30
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configure Git to accept a particular self-signed server certificate for a particular https remote
...ouble"; instead, he has set up Git to be accessible via an https:// URL (and username/password authentication). The server for this URL presents a self-signed certificate, so he advised everyone to turn off certificate validation. This does not strike me as a good setup, security-wise.
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Create and append dynamically
...id='block'> you've created. You just need to create another <div> and call appendChild().
// Your existing code unmodified...
var iDiv = document.createElement('div');
iDiv.id = 'block';
iDiv.className = 'block';
document.getElementsByTagName('body')[0].appendChild(iDiv);
// Now create an...
Placing border inside of div and not on its edge
I have a <div> element and I want to put a border on it. I know I can write style="border: 1px solid black" , but this adds 2px to either side of the div, which is not what I want.
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When to use an object instance variable versus passing an argument to the method
...To some degree, when to use instance variables, how to define their scope, and when to use local variables is subjective, but there are a couple of rules of thumb you can follow whenever creating your classes.
Instance variables are typically considered to be attributes of a class. Think of these ...
svn cleanup: sqlite: database disk image is malformed
... do a svn cleanup because I can't commit the changes in my working copy, and I got the following error:
17 Answers
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Why does Android use Java? [closed]
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Some points:
Java is a known language, developers know it and don't have to learn it
it's harder to shoot yourself with Java than with C/C++ code since it has no pointer arithmetic
it runs in a VM, so no need to recompile it for every phone out there and easy to secure
large number ...
Using PropertyInfo to find out the property type
... validation. The validation is not important as such, but I want to understand the PropertyInfo class better.
2 Answers
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How to get current foreground activity context in android?
... still return a small subset of its data: at least the caller's own tasks, and possibly some other tasks such as home that are known to not be sensitive.
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