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Why are joins bad when considering scalability?
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@slolife regular sql views are like running an extra query in the background on the fly when you use a query that references the view. But you can also tell sql server to "materialize" some views. When you do this, sql server will keep an extra copy of the view's data, j...
How should I ethically approach user password storage for later plaintext retrieval?
...words that are more or less natural language text. While natural language strings might not have the entropy that a string of random characters of the same length has, there's nothing that says your auto-generated password needs to have only 8 (or 10 or 12) characters. Get a high-entropy auto-gene...
Why use double indirection? or Why use pointers to pointers?
...oring lol
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int wordsinsentence(char **x) {
int w = 0;
while (*x) {
w += 1;
x++;
}
return w;
}
int wordsinmono(char ***x) {
int w = 0;
while (*x) {
w += wordsinsentence(*x);
...
What is the significance of 1/1/1753 in SQL Server?
... valid (because the Julian leap-year
rule applies). Why did Oracle go to extra trouble when the SQL
Standard doesn't seem to require it? The answer is that users might
require it. Historians and astronomers use this hybrid system instead
of a proleptic Gregorian calendar. (This is also the d...
Is there a difference between foreach and map?
...f the same size with the transformed members (such as converting a list of strings to uppercase)
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printf() formatting for hex
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The # part gives you a 0x in the output string. The 0 and the x count against your "8" characters listed in the 08 part. You need to ask for 10 characters if you want it to be the same.
int i = 7;
printf("%#010x\n", i); // gives 0x00000007
printf("0x%08x\n", i);...
How did Google manage to do this? Slide ActionBar in Android application
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}
static class MenuDesc {
public int icon;
public String label;
}
public SlideMenuAdapter(Activity act, SlideMenu.SlideMenuAdapter.MenuDesc[] items) {
super(act, R.id.menu_label, items);
this.act = act;
this.items = items;
}
@Overr...
How to use '-prune' option of 'find' in sh?
...ge.org/UsingFind)
Just noticed -path is for a path that fully matches the string/path that comes just after find (. in theses examples) where as -name matches all basenames.
find . -path ./.git -prune -o -name file -print
blocks the .git directory in your current directory ( as your finding in...
Python assigning multiple variables to same value? list behavior
...n either case, you can rebind a to a different value (e.g., a = "Now I'm a string!"), but the won't affect the original value, which b and c will still be names for. The difference is that with a list, you can change the value [1, 2, 3] into [1, 2, 3, 4] by doing, e.g., a.append(4); since that's act...
Use email address as primary key?
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String comparison is slower than int comparison. However, this does not matter if you simply retrieve a user from the database using the e-mail address. It does matter if you have complex queries with multiple joins.
If you ...