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LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
...OrDefault have to iterate over at most 2 items if Linq is talking to a database for example? Just wondering..
– Memet Olsen
Jun 14 '13 at 7:50
3
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Why is there no std::stou?
...+11 21.5/1: Effects: the first two functions call strtol(str.c_str(), ptr, base), and the last three functions call strtoul(str.c_str(), ptr, base), strtoll(str.c_str(), ptr, base), and strtoull(str.c_str(), ptr, base), respectively.
– Mike Seymour
Jan 3 '12 at...
Fastest way to check if string contains only digits
...
Here's some benchmarks based on 1000000 parses of the same string:
Updated for release stats:
IsDigitsOnly: 384588
TryParse: 639583
Regex: 1329571
Here's the code, looks like IsDigitsOnly is faster:
class Program
{
private stati...
Convert from ASCII string encoded in Hex to plain ASCII?
...his, here's one of the shortest, using only python-provided stuff:
import base64
hex_data ='57696C6C20796F7520636F6E76657274207468697320484558205468696E6720696E746F20415343494920666F72206D653F2E202E202E202E506C656565656173652E2E2E212121'
ascii_string = str(base64.b16decode(hex_data))[2:-1]
print (a...
Change select box option background color
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I don't know if you've considered it or not but if your application is based on coloring various groupings of items you should probably use the <optgroup> tag coupled with a class for further referencing. For example:
<select>
<optgroup label="Numbers" class="green">
...
jQuery Ajax POST example with PHP
I am trying to send data from a form to a database. Here is the form I am using:
15 Answers
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Difference between hard wrap and soft wrap?
...nd, soft wrapping is annoying because most all command line tools use line-based diff-ing (version control is where this becomes most noticeable to me). If you've got a 1/3-page paragraph that's soft wrapped and fix a typo, it's basically impossible to see where the change is in a regular diff outpu...
Getting the location from an IP address [duplicate]
...lient-side scripting, PHP for server-side scripting, and MySQL for the database.
23 Answers
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How would I extract a single file (or changes to a file) from a git stash?
...directory like git stash apply would. (So if you have any changes from the base the stash was created on, they'll be lost).
– peterflynn
Apr 5 '13 at 22:04
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Swift Beta performance: sorting arrays
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static const uint64_t NANOS_PER_SEC = 1000ULL * NANOS_PER_MSEC;
mach_timebase_info_data_t timebase_info;
uint64_t abs_to_nanos(uint64_t abs) {
if ( timebase_info.denom == 0 ) {
(void)mach_timebase_info(&timebase_info);
}
return abs * timebase_info.numer / timebase_info.de...