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GCC dump preprocessor defines
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Late answer - I found the other answers useful - and wanted to add a bit extra.
How do I dump preprocessor macros coming from a particular header file?
echo "#include <sys/socket.h>" | gcc -E -dM -
or (thanks to @mymedia for the suggestion):
gcc -E -dM -include sys/socket.h - < /de...
How do I load the contents of a text file into a javascript variable?
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If you only want a constant string from the text file, you could include it as JavaScript:
// This becomes the content of your foo.txt file
let text = `
My test text goes here!
`;
<script src="foo.txt"></script>
<script>
c...
How to change the output color of echo in Linux
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It may be more convenient to insert tput's output directly into your echo strings using command substitution:
echo "$(tput setaf 1)Red text $(tput setab 7)and white background$(tput sgr 0)"
Example
The above command produces this on Ubuntu:
Foreground & background colour commands
tp...
How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterat
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Use an Iterator and call remove():
Iterator<String> iter = myArrayList.iterator();
while (iter.hasNext()) {
String str = iter.next();
if (someCondition)
iter.remove();
}
s...
Java: Why is the Date constructor deprecated, and what do I use instead?
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What Date did was parse a String, so instead we now have to substring a String which contains the year, month and day? Seems like a lot of extra hassle for something which in most cases doesn't need such complex logic and methods added to it.
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PostgreSQL: How to change PostgreSQL user password?
...ere's a difference, and in a DML query you have to use ' when dealing with strings, but is there a special reason to use both of them here?
– Boyan
Mar 23 '16 at 11:17
8
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Visual Studio window which shows list of methods
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You will find "Options" in the menu under "Extras".
– ohgodnotanotherone
Sep 4 '17 at 8:43
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How can I manually generate a .pyc file from a .py file
...part of the python standard library, so you don't need to install anything extra to use it. This works exactly the same way for python2 and python3.
python -m compileall .
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MySQL “NOT IN” query
... it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time.
[…]
MySQL can optimize all three methods to do a sort of NESTED LOOPS ANTI JOIN.
[…]
However, these three methods generate three different plans which are executed by three di...
Are Javascript arrays sparse?
...ly hash tables internally, so you can use not only large integers but also strings, floats, or other objects. All keys get converted to strings via toString() before being added to the hash. You can confirm this with some test code:
<script>
var array = [];
array[0] = "zero";
array[new ...