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Java Hashmap: How to get key from value?
If I have the value "foo" , and a HashMap<String> ftw for which ftw.containsValue("foo") returns true , how can I get the corresponding key? Do I have to loop through the hashmap? What is the best way to do that?
...
iPhone App 开发第一步：从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
...ist
将以下两段中的YES改为NO
<key>CODE_SIGNING_REQUIRED</key>
<string>YES</string>
...
<key>ENTITLEMENTS_REQUIRED</key>
<string>YES</string>
修改Info.plist
同样先备份原文件：
cd /Developer/Platforms/iPhoneOS.platform/
sudo cp Info.plist Info.plist.orig
进行编...
Why can I initialize a List like an array in C#?
...onary<TKey, TValue> takes two items:
var grades = new Dictionary<string, int>
{
{ "Suzy", 100 },
{ "David", 98 },
{ "Karen", 73 }
};
Is roughly identical to:
var temp = new Dictionary<string, int>();
temp.Add("Suzy", 100);
temp.Add("David", 98);
...
Get line number while using grep
I am using grep recursive to search files for a string, and all the matched files and the lines containing that string are print on the terminal. But is it possible to get the line numbers of those lines too??
...
Test if a property is available on a dynamic variable
...p();
Console.WriteLine("Testing with exception: " + sw.ElapsedTicks.ToString() + " ticks");
sw.Restart();
for (int i = 0; i < 100000; i++)
{
TestWithReflection(test, FlipCoin(random));
}
sw.Stop();
Console.WriteLine("Testing with reflection: " + sw.Elapsed...
How to avoid the “Circular view path” exception with Spring MVC test
...ks the following
if (path.startsWith("/") ? uri.equals(path) : uri.equals(StringUtils.applyRelativePath(uri, path))) {
throw new ServletException("Circular view path [" + path + "]: would dispatch back " +
"to the current handler URL [" + uri + "] again. Check your ViewR...
When to use @QueryParam vs @PathParam
...h. Such as:
/departments/{dept}/employees/{id}
Some REST APIs use query strings for filtering, pagination and sorting, but Since REST isn't a strict standard I'd recommend checking some REST APIs out there such as github and stackoverflow and see what could work well for your use case.
I'd reco...
ArrayIndexOutOfBoundsException when using the ArrayList's iterator
...
The easiest way to write this loop is using the for-each construct:
for (String s : arrayList)
if (s.equals(value))
// ...
As for
java.lang.ArrayIndexOutOfBoundsException: -1
You just tried to get element number -1 from an array. Counting starts at zero.
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Can a unit test project load the target application's app.config file?
... public void VerifyAppDomainHasConfigurationSettings()
{
string value = ConfigurationManager.AppSettings["TestValue"];
Assert.IsFalse(String.IsNullOrEmpty(value), "No App.Config found.");
}
}
Ideally, you should be writing code such that your configuration objects ...
JAX-RS — How to return JSON and HTTP status code together?
...th("retrieve/{uuid}")
public Response retrieveSomething(@PathParam("uuid") String uuid) {
if(uuid == null || uuid.trim().length() == 0) {
return Response.serverError().entity("UUID cannot be blank").build();
}
Entity entity = service.getById(uuid);
if(entity == null) {
...