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How do I find if a string starts with another string in Ruby?
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263
puts 'abcdefg'.start_with?('abc') #=> true
[edit] This is something I didn't know before t...
How are multi-dimensional arrays formatted in memory?
...eter, bad things are going to happen. Here's a quick example:
int array1[3][2] = {{0, 1}, {2, 3}, {4, 5}};
In memory looks like this:
0 1 2 3 4 5
exactly the same as:
int array2[6] = { 0, 1, 2, 3, 4, 5 };
But if you try to pass array1 to this function:
void function1(int **a);
you'll ge...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
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Standard C Preprocessor
$ cat xx.c
#define VARIABLE 3
#define PASTER(x,y) x ## _ ## y
#define EVALUATOR(x,y) PASTER(x,y)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1...
How to produce a range with step n in bash? (generate a sequence of numbers with increments)
...n its own).
Note that seq allows floating-point numbers (e.g., seq .5 .25 3.5) but bash's brace expansion only allows integers.
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git: difference between “branchname” and “refs/heads/branchname”
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Create an index on a huge MySQL production table without table locking
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134
[2017] Update: MySQL 5.6 has support for online index updates
https://dev.mysql.com/doc/refman...
How to make blinking/flashing text with CSS 3
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edited Sep 25 '19 at 17:23
Peter Mortensen
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how do I work around log4net keeping changing publickeytoken
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edited Apr 24 '13 at 3:33
gsk
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answered Jan 10 '12 at...
MySQL - ORDER BY values within IN()
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233
SELECT id, name
FROM mytable
WHERE name IN ('B', 'A', 'D', 'E', 'C')
ORDER BY FIELD(name, 'B', ...
warning: implicit declaration of function
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236
You are using a function for which the compiler has not seen a declaration ("prototype") yet.
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