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Database Structure for Tree Data Structure
What would be the best way to implement a customizable (meaning, a tree structure with an unknown number of level) tree data structure in a database?
...
Postgresql - change the size of a varchar column to lower length
...You'll need to figure out how to truncate those manually--so you're back some locks just on oversize ones--because if someone tries to update anything on that row it's going to reject it as too big now, at the point it goes to store the new version of the row. Hilarity ensues for the user.
VARCHAR...
“Single-page” JS websites and SEO
...perience. It only brings what used to be an afterthought and "if we have time" to the forefront of web development.
What your describe in option #1 is usually the best way to go - but, like other accessibility and SEO issues, doing this with pushState in a JavaScript-heavy app requires up-front pla...
Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
...ot actually a JSON Array - that would look like this:
[
{
"name": "Test order1",
"detail": "ahk ks"
},
{
"name": "Test order2",
"detail": "Fisteku"
}
]
Since you're not controlling the exact process of deserialization (RestEasy does) - a first opti...
How do I query if a database schema exists
...ss we run a database update script as we deploy code to 4 different environments. Further, since the same query will get added to until we drop a release into production it has to be able to run multiple times on a given database. Like this:
...
Remove padding from columns in Bootstrap 3
... <div class="widget-header">
<h3>Dimensions</h3>
</div>
<div class="widget-content">
</div>
</div>
</div>
<div class="col-md-8 nopadding">
...
What is the reason behind cbegin/cend?
...mple. Say I have a vector:
std::vector<int> vec;
I fill it with some data. Then I want to get some iterators to it. Maybe pass them around. Maybe to std::for_each:
std::for_each(vec.begin(), vec.end(), SomeFunctor());
In C++03, SomeFunctor was free to be able to modify the parameter it g...
Get form data in ReactJS
...() {
return (
<form>
<input type="text" name="email" placeholder="Email" value={this.state.email} onChange={this.handleEmailChange} />
<input type="password" name="password" placeholder="Password" value={this.state.password} onChange={this.handlePassw...
How to add minutes to my Date
...her approach:
It can be as simple as this (other option is to use joda-time)
static final long ONE_MINUTE_IN_MILLIS=60000;//millisecs
Calendar date = Calendar.getInstance();
long t= date.getTimeInMillis();
Date afterAddingTenMins=new Date(t + (10 * ONE_MINUTE_IN_MILLIS));
...
Python Write bytes to file
...this is a bug in python itself, given python can detect data types at runtime, and can detect between binary and text input, I think it should be fixed in python itself, why are hundreds of people ending up in this page, if it could have been avoided by an if statement in the python stdlib, upvote i...