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How to initialize all members of an array to the same value?
...8(...) STRUCTVAL_32(__VA_ARGS__), STRUCTVAL_16(__VA_ARGS__)
struct Pair { char key[16]; char val[32]; };
struct Pair p_data[] = { STRUCTVAL_48("Key", "Value") };
int a_data[][4] = { STRUCTVAL_48(12, 19, 23, 37) };
macro names are negotiable.
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How to find index of all occurrences of element in array?
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array.reduce((a, e, i) => (e === value) ? a.concat(i) : a, [])
– yckart
Dec 21 '16 at 20:46
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Remove portion of a string after a certain character
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+1 It's the only one that works if the control characters are NOT present (unlike the others that return an empty string if the control characters are not present in the source string)
– Tom Auger
Apr 28 '15 at 2:26
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How can I hash a password in Java?
...te[16];
random.nextBytes(salt);
KeySpec spec = new PBEKeySpec("password".toCharArray(), salt, 65536, 128);
SecretKeyFactory f = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
byte[] hash = f.generateSecret(spec).getEncoded();
Base64.Encoder enc = Base64.getEncoder();
System.out.printf("salt: %s...
What does {0} mean when initializing an object?
... initialized shall be
default-initialized.
Example:
struct S { int a; char* b; int c; };
S ss = { 1, "asdf" };
initializes ss.a with 1, ss.b with
"asdf", and ss.c with the value of an
expression of the form int(), that is,
0.
You can find the complete spec on this topic here
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How can I strip first and last double quotes?
... If string is '"' (just one double quote), this will remove the single character. I think this is probably not what is desired, probably Walapa wanted to only remove the double quote if it was matched.
– dbn
Aug 26 '16 at 0:28
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How to replace all occurrences of a character in string?
What is the effective way to replace all occurrences of a character with another character in std::string ?
15 Answers
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Passing base64 encoded strings in URL
...ed to url-encode it, since base64 strings can contain the "+", "=" and "/" characters which could alter the meaning of your data - look like a sub-folder.
Valid base64 characters are below.
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=
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Clearing localStorage in javascript?
...rStorageExcept = function(exceptions) {
let keys = [];
exceptions = [].concat(exceptions); // prevent undefined
// get storage keys
$.each(localStorage, (key) => {
keys.push(key);
});
// loop through keys
for (let i = 0; i < keys.length; i++) {
let key = keys[i];
le...
techniques for obscuring sensitive strings in C++
...void this. If for example you are sending the key off to a server, send it character by character, so the whole string is never around. Of course, if you are using it from something like RSA encoding, then this is trickier.
4) Do an ad-hoc algorithm -- on top of all this, add a unique twist or two....