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How do I use extern to share variables between source files?
...ize of any common blocks.
Note that GCC 10.1.0, which was released on 2020-05-07, changes the
default compilation options to use
-fno-common, which means
that by default, the code above no longer links unless you override the
default with -fcommon (or use attributes, etc — see the link).
The next...
Why can't I see the “Report Data” window when creating reports?
...edy this, I had to:
Exclude the report from my project to stop the build errors
Clean & rebuild my project
Refresh the Data Sources pane & confirm I could see the new fields
Re-include the report and open the report designer with the Data Sources pane pinned in view
(This is the key) Drag...
Convert char to int in C and C++
...rn (unsigned char)c; }
char chr(int n) {
assert(0 <= n); // Or other error-/sanity-checking.
assert(n <= UCHAR_MAX);
return (unsigned char)n;
}
// Ord and chr are named to match similar functions in other languages
// and libraries.
ord(c) always gives you a non-negative value – ev...
How can I swap positions of two open files (in splits) in vim?
...
Starting with this:
____________________
| one | two |
| | |
| |______|
| | three|
| | |
|___________|______|
Make 'three' the active window, then issue the command ctrl+w J. This moves ...
Finding last occurrence of substring in string, replacing that
...ly like this solution but having replacements=None parameter seems like an error to me because if the parameter is omitted the function will give an error (tried in Python 2.7). I would suggest either remove the default value, set it to -1 (for unlimited replacements) or better make it replacements=...
SQL select join: is it possible to prefix all columns as 'prefix.*'?
..., the main table's field values are overriden with the joinedtable values. Error prone, frustrating and a violation of DRY when having to manually specify the table fields with aliases over and over...
Here is a PHP (Wordpress) function to achieve this through code generation together with an examp...
How to sign an android apk file
...mall overview without reference or eclipse around, so leave some space for errors, but it works like this
Open your project in eclipse
Press right-mouse - > tools (android tools?) - > export signed application (apk?)
Go through the wizard:
Make a new key-store. remember that password
Sign yo...
In Python, what is the difference between “.append()” and “+= []”?
...Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCTION, and += version -- in BUILD_LIST. Apparently BUILD_LIST outweighs LOAD_ATTR + CALL_FUNCTION.
>>> import dis
>>> dis.dis(compile("s = []; s.append('spam')", '', 'exec'))
1 ...
Pass in an array of Deferreds to $.when()
...'+capitalCity,
success: function(response) {
},
error: function(response) {
console.log("Error")
}
});
}
$(function(){
var capitalCities = ['Delhi', 'Beijing', 'Washington', 'Tokyo', 'London'];
$('#capitals').text(capitalCities);
fu...
Subprocess changing directory
...
@The_Diver That's why cd must be implemented as internal shell command. There's no other way to do it. Internal shell commands are executed within the same process as the shell. What I meant by subshell is the shell executed for ...