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Default value of a type at Runtime [duplicate]
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@Shimmy Why would this fail for string? The default value of string is null.
– Mike Zboray
Apr 19 '15 at 3:17
3
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What is the lifetime of a static variable in a C++ function?
...r of construction must be taken into account.
Example
struct emitter {
string str;
emitter(const string& s) : str(s) { cout << "Created " << str << endl; }
~emitter() { cout << "Destroyed " << str << endl; }
};
void foo(bool skip_first)
{
if ...
Android device does not show up in adb list [closed]
...show up with "Unknown driver" status.
Click on "Update Driver" and select /extras/google/usb_driver
Device Manager will find the driver and warn you about installing it. Select "Yes."
This time the device got installed properly.
Note that I didn't have to modify winusb.inf file or update any othe...
Deleting Objects in JavaScript
... of them would cause a crash. To make them all turn null would mean having extra work when deleting or extra memory for each object.)
Since Javascript is garbage collected, you don't need to delete objects themselves - they will be removed when there is no way to refer to them anymore.
It can be ...
Embedding SVG into ReactJS
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If you just have a static svg string you want to include, you can use dangerouslySetInnerHTML:
render: function() {
return <span dangerouslySetInnerHTML={{__html: "<svg>...</svg>"}} />;
}
and React will include the markup directly...
How do you serialize a model instance in Django?
...ou have a completely flat data structure (no ForeignKeys, only numbers and strings in the database, etc.). Otherwise, you should seriously think about the right way to implement this method.
Third, call demjson.JSON.encode(instance) and you have what you want.
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Xcode: What is a target and scheme in plain language?
...y project has two targets, a "normal" build and an "office" build that has extra testing features and may contain several background music tracks and a button to change the track (as it currently does).
You'll be used to adding classes and resources to your default target as you add them.
You can pi...
Response.Redirect with POST instead of Get?
...
You can use this aproach:
Response.Clear();
StringBuilder sb = new StringBuilder();
sb.Append("<html>");
sb.AppendFormat(@"<body onload='document.forms[""form""].submit()'>");
sb.AppendFormat("<form name='form' action='{0}' method='post'>",postbackUrl...
C++ Erase vector element by value rather than by position? [duplicate]
...ude <iostream>
#include <range/v3/all.hpp>
int main(int argc, char const *argv[])
{
std::vector<int> vi{2,4,6,8,10};
for (auto& i : vi) {
std::cout << i << std::endl;
}
std::cout << "-----" << std::endl;
std::vector<int>...
Can a java file have more than one class?
...s to be a nested class.
public class first {
public static void main(String[] args) {
// TODO Auto-generated method stub
}
public class demo1
{
public class demo2
{
}
}
}
...