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Most efficient method to groupby on an array of objects
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Using ES6 Map object:
/**
* @description
* Takes an Array<V>, and a grouping function,
* and returns a Map of the array grouped by the grouping function.
*
* @param list An array of type V.
* @param keyGetter A Function that takes the the Arra...
How to convert JSON to XML or XML to JSON?
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The description of the problem in this commentary applies well to ALL implementations of algorithms which convert JSON to XML or the reverse. Once one accepts that it is not possible simultaneously achieve perfect bi-directional...
Application Skeleton to support multiple screens
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Android defines four generalised screen densities:
Qualifier Description Nominal value
ldpi low density 120 ppi
mdpi medium density 160 ppi
hdpi high density 240 ppi
xhdpi extra high density 320 pp...
SecurityException: Permission denied (missing INTERNET permission?)
... does not need to explicitly grant these permission.
See behavior changes description page for details and make sure your app will behave correctly on newer systems too. It's is especially important when your project set targetSdk to at least 23 as then you must support new permissions model (deta...
Best way to format integer as string with leading zeros? [duplicate]
...of digits ($cnt).
What the best way to translate this simple function from PHP to Python:
10 Answers
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How do I dump an object's fields to the console?
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As this is the first answer found when looking for a php var_dump equivalent in ruby, i found that pp is much usaful in that case, look here - stackoverflow.com/questions/6501506/ruby-inspect-readability/…
– Rabin
Sep 7 '16 at 12:45
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jQuery validation: change default error message
... required: true,
minlength: 2,
remote: "users.php"
}
},
messages: {
firstname: "Enter your firstname",
lastname: "Enter your lastname",
username: {
required: "Enter a username",
minlength: jQuery.format("Ent...
How does Activity.finish() work in Android?
Could someone provide a description of what happens when an Activity calls its finish() method?
4 Answers
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Android TextView with Clickable Links: how to capture clicks?
...findViewById(R.id.library_rss_expan_chaild_des_textView);
String dec=d.get_description()+"<a href='"+d.get_link()+"'><u>more</u></a>";
CharSequence sequence = Html.fromHtml(dec);
SpannableStringBuilder strBuilder = new SpannableStringBuilder(sequence);
UnderlineSpan[] underli...
How to open a web server port on EC2 instance
... to connect , and then click Next.
In the Name dialog box, type a name and description for this rule, and then click Finish.
Ref:- Microsoft Docs for port Opening
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