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What is token-based authentication?
...can offer the token - which
offers access to a specific resource
for a time period - to the remote
site.
In other words: add one level of indirection for authentication -- instead of having to authenticate with username and password for each protected resource, the user authenticates that wa...
What is the difference between printf() and puts() in C?
...nt of printf:
char * myMessage;
// ... myMessage gets assigned at runtime, unpredictable content
printf(myMessage); // <--- WRONG! (what if myMessage contains a '%' char?)
puts(myMessage); // ok
printf("%s\n",myMessage); // ok, equivalent to the previous, perhaps less efficient
...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
... and assign the result... which in the majority case is going to be a a runtime array. You can avoid the overhead of looking for the global constructor by just using []. It may seem small, but when you're shooting for near real-time performance in your app, it can make a difference.
...
C char array initialization
...illegal for this reason.
To initialize an array, you have to do it at the time of definition:
char buf [10] = ' ';
will give you a 10-character array with the first char being the space '\040' and the rest being NUL, i.e., '\0'. When an array is declared and defined with an initializer, the arra...
How do I put an already-running process under nohup?
I have a process that is already running for a long time and don't want to end it.
11 Answers
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How long do browsers cache HTTP 301s?
... find edge cases where it makes sense for a "permanent" redirect to have a time limit. Note that 302 and 307 redirects aren't cached by default by browsers.
If you previously issued a 301 redirect but want to un-do that
If people still have the cached 301 redirect in their browser they will continu...
How to check for a valid Base64 encoded string
...
Its length needs to be a multiple of 3, at the time of encoding, for successful encoding! Sorry about that... and yeah, you're right... The encoded string has a length which is a multiple of 4. Thats why we'd pad upto 3 '=' .
– Anirudh Ramanathan
...
“Least Astonishment” and the Mutable Default Argument
... To anyone reading the above answer, I strongly recommend you take the time to read through the linked Effbot article. As well as all the other useful info, the part on how this language feature can be used for result caching/memoisation is very handy to know!
– Cam Jackson...
How to get overall CPU usage (e.g. 57%) on Linux [closed]
...
Every time I run this command, I get the exact same output (32.7%).
– alanaktion
Jul 18 '13 at 1:58
13
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Understanding how recursive functions work
...n is stemming from thinking of it as "the same function" being called many times. If you think of it as "many copies of the same function being called", then it may be clearer:
Only one copy of the function ever returns 0, and it's not the first one (it's the last one). So the result of calling the...