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Using JQuery to check if no radio button in a group has been checked
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Use .length refer to http://api.jquery.com/checked-selector/
if ($('input[name="html_elements"]:checked').length === 0) alert("Not checked");
else alert("Checked");
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What is a raw type and why shouldn't we use it?
...e type is not a raw type.
Raw types show up in legacy code because lots of API classes (such as the Collections classes) were not generic prior to JDK 5.0. When using raw types, you essentially get pre-generics behavior — a Box gives you Objects. For backward compatibility, assigning a parameteriz...
#pragma once vs include guards? [duplicate]
...e, or to rename one of the headers. The names of headers are part of your API contract, so renaming is probably not an option.
(The short version of why this is unfixable is that neither the Unix nor the Windows filesystem API offer any mechanism that guarantees to tell you whether two absolute pa...
Rounding a double to turn it into an int (java)
...use a String in the constructor
// http://java.sun.com/j2se/1.5.0/docs/api/java/math/BigDecimal.html#BigDecimal(double)
BigDecimal bd = new BigDecimal(Double.toString(d));
bd = bd.setScale(decimalPlace,BigDecimal.ROUND_HALF_UP);
return bd.doubleValue();
}
}
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When and how should I use a ThreadLocal variable?
...en using them to avoid unwanted side-effects and memory leaks. Design your APIs so that the ThreadLocal values will always be automatically cleared when they are not needed anymore and that incorrect use of the API won't be possible (for example like this). ThreadLocals can be used to make the code ...
chart.js load totally new data
The API for chart.js allows one to edit points of the datasets loaded into it, for example:
19 Answers
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Indexes of all occurrences of character in a string
...Kotlin Solution to add this logic as a new a new methods into CharSequence API using extension method:
// Extension method
fun CharSequence.indicesOf(input: String): List<Int> =
Regex(Pattern.quote(input)) // build regex
.findAll(this) // get the matches
.map { it...
How to explain callbacks in plain english? How are they different from calling one function from ano
...o survive.
See also:
http://javascript.crockford.com/survey.html
http://api.jquery.com/jQuery.when/
http://api.jquery.com/jQuery.getJSON/
http://github.com/josher19/jQuery-Parse
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Limit file format when using ?
...JavaScript (rather than just by looking at the extension) using HTML5 File API, but still, the file must be verified on the server, because a malicious user will still be able to upload files by making a custom HTTP request.
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HTTP GET with request body
...t this is also common practice: The popular ElasticSearch engine's _search API recommends GET requests with the query attached in a JSON body. As a concession to incomplete HTTP client implementations, it also allows POST requests here.
– Christian Pietsch
Oct ...