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Which is faster : if (bool) or if(int)?
...ool and int in if condition. So just out of curiosity I wrote this program:
8 Answers
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How do I find the time difference between two datetime objects in python?
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>>> import datetime
>>> first_time = datetime.datetime.now()
>>> later_time = datetime.datetime.now()
>>> difference = later_time - first_time
>>> seconds_in_day = 24 * 60 * 60
date...
When would anyone use a union? Is it a remnant from the C-only days?
I have learned but don't really get unions. Every C or C++ text I go through introduces them (sometimes in passing), but they tend to give very few practical examples of why or where to use them. When would unions be useful in a modern (or even legacy) case? My only two guesses would be programming ...
Using GCC to produce readable assembly?
I was wondering how to use GCC on my C source file to dump a mnemonic version of the machine code so I could see what my code was being compiled into. You can do this with Java but I haven't been able to find a way with GCC.
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Serializing object that contains cyclic object value
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Use the second parameter of stringify, the replacer function, to exclude already serialized objects:
var seen = [];
JSON.stringify(obj, function(key, val) {
if (val != null && typeof val == "object") {
if (seen.indexOf(val) >= 0) {
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Why do we need extern “C”{ #include } in C++?
...hen you include a header file with a C++ compiler, the compiler is expecting C++ code. If, however, it is a C header, then the compiler expects the data contained in the header file to be compiled to a certain format—the C++ 'ABI', or 'Application Binary Interface', so the linker chokes up. This i...
How to replace a whole line with sed?
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Try this:
sed "s/aaa=.*/aaa=xxx/g"
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What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
Python's http.server (or SimpleHTTPServer for Python 2) is a great way of serve the contents of the current directory from the command line:
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
I am getting the following error:
8 Answers
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How can I be notified when an element is added to the page?
I want a function of my choosing to run when a DOM element is added to the page. This is in the context of a browser extension, so the webpage runs independently of me and I cannot modify its source. What are my options here?
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