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How to remove unused C/C++ symbols with GCC and ld?
...unreferenced sections):
-Wl,--gc-sections
So if you had one file called test.cpp that had two functions declared in it, but one of them was unused, you could omit the unused one with the following command to gcc(g++):
gcc -Os -fdata-sections -ffunction-sections test.cpp -o test -Wl,--gc-sections...
Why do assignment statements return a value?
...tanding is 100% incorrect." -- While the OP's use of English isn't the greatest, his/her "understanding" is about what should be the case, making it an opinion, so it isn't the sort of thing than can be "100% incorrect". Some language designers agree with the OP's "should", and make assignments have...
In CMake, how can I test if the compiler is Clang?
...;LANG>_COMPILER_ID value for Apple-provided Clang is now AppleClang. To test for both the Apple-provided Clang and the regular Clang use the following if condition:
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
# using regular Clang or AppleClang
endif()
Also see the AppleClang policy description...
How to create a file with a given size in Linux?
For testing purposes I have to generate a file of a certain size (to test an upload limit).
13 Answers
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How to allocate aligned memory only using the standard library?
I just finished a test as part of a job interview, and one question stumped me, even using Google for reference. I'd like to see what the StackOverflow crew can do with it:
...
ASP.NET: Session.SessionID changes between requests
...
In my case, i was testing on localhost and the "requireSSL" in web.config was set as "true". Thanks.
– William Pereira
Dec 26 '16 at 13:27
...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
...ble PgAdmin-III isn't showing you the full error. Here's what happens if I test it in psql on PostgreSQL 9.2:
=> CREATE TABLE test( x varchar );
CREATE TABLE
=> insert into test(x) values ('14'), (' 42 ');
INSERT 0 2
=> ALTER TABLE test ALTER COLUMN x TYPE integer;
ERROR: column "x" cann...
How to Generate unique file names in C#
...too, and doesn't suffer from race conditions.
For example, if you pass it test.txt, it will attempt to create files in this order:
test.txt
test (2).txt
test (3).txt
etc. You can specify the maximum attempts or just leave it at the default.
Here's a complete example:
class Program
{
stati...
How to display HTML tags as plain text [duplicate]
... may use htmlspecialchars()
<?php
$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);
echo $new; // &lt;a href=&#039;test&#039;&gt;Test&lt;/a&gt;
?>
share
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How to make a valid Windows filename from an arbitrary string?
...n are invalid). Be careful when naming files with ".", for example:
echo "test" > .test.
Will generate a file named ".test"
Lastly, if you really want to do things correctly, there are some special file names you need to look out for. On Windows you can't create files named:
CON, PRN, AUX, ...