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How to convert Strings to and from UTF8 byte arrays in Java
...]:
String s = "some text here";
byte[] b = s.getBytes(StandardCharsets.UTF_8);
Convert from byte[] to String:
byte[] b = {(byte) 99, (byte)97, (byte)116};
String s = new String(b, StandardCharsets.US_ASCII);
You should, of course, use the correct encoding name. My examples used US-ASCII and UT...
Check if application is on its first run [duplicate]
...droid development and and I want to setup some of application's attributes based on Application first run after installation. Is there any way to find that the application is running for the first time and then to setup its first run attributes?
...
jQuery trigger file input
... <img src="http://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Icon_-_upload_photo_2.svg/512px-Icon_-_upload_photo_2.svg.png" width="20px" height="20px"/>
</label>
<input type="file" value="upload" id="uploadFile" class="uploadFile" />
</div>
</body>...
Getting the first character of a string with $str[0]
...ng multibyte encodings (such as UTF-8). If you want to support that, use mb_substr(). Arguably, you should always assume multibyte input these days, so this is the best option, but it will be slightly slower.
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How to initialize a vector in C++ [duplicate]
... give you the beginning and end of an array:
template <typename T, size_t N>
T* begin(T(&arr)[N]) { return &arr[0]; }
template <typename T, size_t N>
T* end(T(&arr)[N]) { return &arr[0]+N; }
And then you can do this without having to repeat the size all over:
int vv[]...
Invert “if” statement to reduce nesting
... clearer. For example:
double getPayAmount() {
double result;
if (_isDead) result = deadAmount();
else {
if (_isSeparated) result = separatedAmount();
else {
if (_isRetired) result = retiredAmount();
else result = normalPayAmount();
};
...
How to exclude property from Json Serialization
...erSerialization memberSerialization)
{
JsonProperty property = base.CreateProperty(member, memberSerialization);
if (this.ignoreProps.Contains(property.PropertyName))
{
property.ShouldSerialize = _ => false;
}
return property;
}
}
Usage...
No == operator found while comparing structs in C++
...rison
what to do when weak pointers aren't valid
how to handle members and bases that don't implement operator== themselves (but might have compare() or operator< or str() or getters...)
what locks must be taken while reading/comparing data that other threads may want to update
So, it's kind of...
ASP.NET MVC: Is Controller created for every request?
...he MvcHandler):
protected internal virtual void ProcessRequest(HttpContextBase httpContext)
{
SecurityUtil.ProcessInApplicationTrust(() =>
{
IController controller;
IControllerFactory factory;
ProcessRequestInit(httpContext, out controller, out factory);
...
In Django, how do I check if a user is in a certain group?
..., and more directly, you can check if a a user is in a group by:
if django_user.groups.filter(name = groupname).exists():
...
Note that groupname can also be the actual Django Group object.
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