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JavaScript checking for null vs. undefined and difference between == and ===
...here "truthy" is a non-zero, non-null, non-undefined, non-false, non-empty-string value. :-)
– T.J. Crowder
Feb 24 '11 at 10:10
2
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Difference between “!==” and “==!” [closed]
... to the question: "a" ==! " " will be parsed to "a" == !" ". Negation of a string is covered by casting, meaning any string but "0" and " " is, when casted, true.
Thus, the expression "a" == !" " will get transferred:
"a" == !" "
"a" == !false
"a" == true
And, as string "a" is not the same as b...
Use URI builder in Android or create URL with variables
... .appendQueryParameter("sort", "relevance")
.fragment("section-name");
String myUrl = builder.build().toString();
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“Invalid JSON primitive” in Ajax processing
...t the error "Invalid JSON primitive: foo"
Try instead setting the data as string
$.ajax({
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data: "{'foo':'foovalue', 'bar':'barvalue'}", //note the additional quotation marks
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})
This way jQuery should leave the data alone and send the string as is to the server which should al...
Difference between SPI and API?
... 4)
// Maps service names to services
private static final Map<String, Provider> providers =
new ConcurrentHashMap<String, Provider>();
public static final String DEFAULT_PROVIDER_NAME = "<def>";
// Provider registration API
public static void register...
Map to String in Java
...n(map) in Java, I get a nice output in stdout. How can I obtain this same string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map) ?
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Getting full URL of action in ASP.NET MVC [duplicate]
...ram>
/// <returns>The absolute URL.</returns>
public static string AbsoluteAction(this UrlHelper url,
string actionName, string controllerName, object routeValues = null)
{
string scheme = url.RequestContext.HttpContext.Request.Url.Scheme;
return url.Action(actionName, co...
Is there a predefined enumeration for Month in the .NET library?
...re.DateTimeFormat.GetMonthName (DateTime.Now.Month);
which will return a string representation (of the current month, in this case). Note that GetMonth takes arguments from 1 to 13 - January is 1, 13 is a blank string.
sha...
csv.Error: iterator should return strings, not bytes
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In Python3, csv.reader expects, that passed iterable returns strings, not bytes. Here is one more solution to this problem, that uses codecs module:
import csv
import codecs
ifile = open('sample.csv', "rb")
read = csv.reader(codecs.iterdecode(ifile, 'utf-8'))
for row in read :
pr...
What does the “static” modifier after “import” mean?
...classes. Where I used to have to do this:
import org.apache.commons.lang.StringUtils;
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if (StringUtils.isBlank(aString)) {
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I can do this:
import static org.apache.commons.lang.StringUtils.isBlank;
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if (isBlank(aString)) {
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