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Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...ask_cors import CORS
app = Flask(__name__)
CORS(app)
@app.route("/")
def helloWorld():
return "Hello, cross-origin-world!"
For more details, you can check the Flask documentation.
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impr...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
...the lock duration is in the order of microseconds.
– Hello World
Jan 2 '15 at 16:06
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What does @hide mean in the Android source code?
...
hello @StarPinkER can i grant "android.permission.CHANGE_COMPONENT_ENABLED_STATE" permissio using hidden or internal api or by reflaction?
– Hardik
Feb 8 '14 at 9:39
...
Assign width to half available screen width declaratively
...out_width="0dp"
android:layout_height="wrap_content"
android:text="Hello World"
android:layout_weight="0.5"/>
</LinearLayout>
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What are the security risks of setting Access-Control-Allow-Origin?
...s what is reported by Chrome: "XMLHttpRequest cannot load localhost:12346/hello. A wildcard '' cannot be used in the 'Access-Control-Allow-Origin' header when the credentials flag is true. Origin 'localhost:12345' is therefore not allowed access. The credentials mode of an XMLHttpRequest is control...
Adding an identity to an existing column
...t identity(1,1),
somecolumn varchar(10)
);
INSERT INTO Test VALUES ('Hello');
INSERT INTO Test VALUES ('World');
-- copy the table. use same schema, but no identity
CREATE TABLE Test2
(
id int NOT NULL,
somecolumn varchar(10)
);
ALTER TABLE Test SWITCH TO Test2;
-- drop the ori...
Why is rbindlist “better” than rbind?
...frame(a=1:3); .Internal(inspect(DF)); tracemem(DF); attr(DF,"test") <- "hello"; .Internal(inspect(DF)).
– Matt Dowle
Mar 28 '13 at 13:38
4
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What is Node.js' Connect, Express and “middleware”?
...eServer(function (request, response) {
// respond
response.write('hello client!');
response.end();
});
server.listen(3000);
What connect adds
Middleware is basically any software that sits between your application code and some low level API. Connect extends the built-in HTTP serve...
return statement vs exit() in main()
...#include <stdio.h>
#include <stdlib.h>
int main() {
printf("Hello, World!\n");
exit(EXIT_SUCCESS); /* to get good return value to OS */
/*NOTREACHED*/ /* to silence lint warning */
return 0; /* to silence compiler warning */
}
Aside: If I recall correctly, the VMS conventio...
Python's many ways of string formatting — are the older ones (going to be) deprecated?
...pproach of the old % formatter:
"{greeting}, {0}".format(world, greeting='Hello')
and is extensible through the object.__format__() hook used to handle formatting of individual values.
Note that the old system had % and the Template class, where the latter allows you to create subclasses that ad...