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Storing JSON in database vs. having a new column for each key
...JSON useful in a relational database:
When storing email addresses and phone numbers for a contact, where storing them as values in a JSON array is much easier to manage than multiple separate tables
Saving arbitrary key/value user preferences (where the value can be boolean, textual, or numeric, ...
Keyboard shortcuts are not active in Visual Studio with Resharper installed
...re conservative suggestion by ND72--that advice worked for me or more than one workstation, and it affects only ReSharper settings and not Visual Studio settings.
– Jazimov
Nov 5 '18 at 16:58
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Visual Studio: How can I see the same file in two separate tab groups?
I want to be able to edit one method while looking at another method in the same file, as reference.
Can this be done?
8 An...
How to construct a relative path in Java from two absolute paths (or URLs)?
...;
public class ResourceUtils {
/**
* Get the relative path from one file to another, specifying the directory separator.
* If one of the provided resources does not exist, it is assumed to be a file unless it ends with '/' or
* '\'.
*
* @param targetPath targetPath i...
Measure elapsed time in Swift
... me, it returns 0.0114653027 which i know for a fact that is not true, the one with dates returns 4.77720803022385sec
– Cristi Băluță
Nov 17 '16 at 17:13
6
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Preferred method to store PHP arrays (json_encode vs serialize)
...is your absolute driving characteristic, then by all means use the fastest one. Just make sure you have a full understanding of the differences before you make a choice
Unlike serialize() you need to add extra parameter to keep UTF-8 characters untouched: json_encode($array, JSON_UNESCAPED_UNICOD...
Constructing pandas DataFrame from values in variables gives “ValueError: If using all scalar values
...w (represented by the given dictionary) has no index (not even an implicit one). A simple solution is to wrap the dictionary within a list, which does have "natural indexing". One can claim that if only one dictionary is given (without a wrapping list), then assume index=0, but that can lead to ac...
How to saveHTML of DOMDocument without HTML wrapper?
...lements
LIBXML_HTML_NODEFDTD prevents a default doctype being added when one is not found.
Full documentation about Libxml parameters is here
(Note that loadHTML docs say that Libxml 2.6 is needed, but LIBXML_HTML_NODEFDTD is only available in Libxml 2.7.8 and LIBXML_HTML_NOIMPLIED is available...
Separators for Navigation
...list items, position the image to the left of the li, but not on the first one.
For example:
#nav li + li {
background:url('seperator.gif') no-repeat top left;
padding-left: 10px
}
This CSS adds the image to every list item that follows another list item - in other words all of them but ...
How does the Amazon Recommendation feature work?
...nity analysis) which is a subset of the field of data mining. Typical components in such a system include identification of primary driver items and the identification of affinity items (accessory upsell, cross sell).
Keep in mind the data sources they have to mine...
Purchased shopping ca...