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Map enum in JPA with fixed values?
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@DN1 feel free to improve it
– Tvaroh
Nov 9 '17 at 20:09
1
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What is the difference between encrypting and signing in asymmetric encryption?
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@Honey no it's not. Generating the key pair is free. The cost is involved in making the others believe the signature is really yours. To do that, you have your public key itself, which you have earlier generated for free, signed by an authority which might or might not ch...
How to find out which fonts are referenced and which are embedded in a PDF document
... document and which are only referenced. Is there an easy (and cheap as in free) way to do that?
6 Answers
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How to convert a std::string to const char* or char*?
...[str.size()] = '\0'; // don't forget the terminating 0
// don't forget to free the string after finished using it
delete[] writable;
Edit: Notice that the above is not exception safe. If anything between the new call and the delete call throws, you will leak memory, as nothing will call delete fo...
Advantages of Antlr (versus say, lex/yacc/bison) [closed]
...tor and resolve conflicts such as left-recursion. Once you have a conflict free grammar, you can let ANTLRworks parse an input file of your language and build a parse tree and AST for you and show the tree graphically in the IDE. This is a very big advantage because it can save you many hours of wor...
Regex Pattern to Match, Excluding when… / Except between
...y only a series of four very simple expressions.
For flavors that support free-spacing, this reads particularly well.
(?mx)
### s1: Match line that ends with a period ###
^.*\.$
| ### OR s2: Match anything between parentheses ###
\([^\)]*\)
| ### OR s3: Match any if(...//endif b...
When to use thread pool in C#? [closed]
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I highly recommend reading the this free e-book:
Threading in C# by Joseph Albahari
At least read the "Getting Started" section. The e-book provides a great introduction and includes a wealth of advanced threading information as well.
Knowing whether or not t...
How do I remove the old history from a git repository?
...age is the first Google's result, it may still be helpful.
If you want to free some space in your git repo, but do not want to rebuild all your commits (rebase or graft), and still be able to push/pull/merge from people who has the full repo, you may use the git clone shallow clone (--depth paramet...
Does using final for variables in Java improve garbage collection?
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After the completion of the mark phase, the GC sweeps through the heap, freeing memory for all unmarked objects (and compacting the memory for the remaining live objects).
Also, it's important to recognize that the Java heap memory is partitioned into a "young generation" and an "old generation"...
Strange \n in base64 encoded string in Ruby
...es the same thing in other languages too (eg. Python).
The reason content-free newlines are added at the encode stage is because base64 was originally devised as an encoding mechanism for sending binary content in e-mail, where the line length is limited. Feel free to replace them away if you don't...