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Waiting until two async blocks are executed before starting another block
When using GCD, we want to wait until two async blocks are executed and done before moving on to the next steps of execution. What is the best way to do that?
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HTML-encoding lost when attribute read from input field
I’m using JavaScript to pull a value out from a hidden field and display it in a textbox. The value in the hidden field is encoded.
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How can you integrate a custom file browser/uploader with CKEditor?
...ed. An optional third parameter can be text that you want displayed in a standard alert dialog, such as "illegal file" or something. Set url to an empty string if the third parameter is an error message.
CKEditor's "upload" tab will submit a file in the field "upload" - in PHP, that goes to $_FILES...
How to detect duplicate values in PHP array?
...he presence of duplicate values, then count the number of duplicate values and out put the results. For example, given the following array:
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How can I read input from the console using the Scanner class in Java?
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Let's say I only use the scanner once and don't want to clutter my code by initializing an then closing the Scanner - is there a way to get input from the user without constructing a class?
– Nearoo
Oct 13 '17 at 8:12
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Why are primes important in cryptography?
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Most basic and general explanation: cryptography is all about number theory, and all integer numbers (except 0 and 1) are made up of primes, so you deal with primes a lot in number theory.
More specifically, some important cryptographi...
How to define an enumerated type (enum) in C?
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Declaring an enum variable is done like this:
enum strategy {RANDOM, IMMEDIATE, SEARCH};
enum strategy my_strategy = IMMEDIATE;
However, you can use a typedef to shorten the variable declarations, like so:
typedef enum {RANDOM, IMMEDIATE, SEARCH} strategy;
strategy my_strategy = IMME...
How do I parse command line arguments in Bash?
...as non-opt/last argument:
#93.184.216.34 example.com
To better understand ${i#*=} search for "Substring Removal" in this guide. It is functionally equivalent to `sed 's/[^=]*=//' <<< "$i"` which calls a needless subprocess or `echo "$i" | sed 's/[^=]*=//'` which calls two needless subp...
What is external linkage and internal linkage?
I want to understand the external linkage and internal linkage and their difference.
9 Answers
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How to modify a global variable within a function in bash?
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When you use a command substitution (ie the $(...) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way - a subshell cannot modify the environment of its parent shell. Your v...