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Ruby optional parameters
... passing an array as the parameter, and then checking if the value at that index was nil or not.
class Array
def ascii_to_text(params)
param_len = params.length
if param_len > 3 or param_len < 2 then raise "Invalid number of arguments #{param_len} for 2 || 3." end
bottom = para...
How to design a multi-user ajax web application to be concurrently safe
...r-Side:
Determine a reasonable level at which you would define what I'd call "atomic artifacts" (the page? Objects on the page? Values inside objects?). This will depend on your webservers, database & caching hardware, # of user, # of objects, etc. Not an easy decision to make.
For each atomic...
How do I call a dynamically-named method in Javascript?
...ut you're creating an array, then assigning to the array's properties (not indexes). You might as well do var dyn_functions = {}; so you don't needlessly create an array... this isn't a huge issue though.
– David Sherret
Nov 26 '13 at 16:46
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How to see if an NSString starts with a certain other string?
...
I like to use this method:
if ([[temp substringToIndex:4] isEqualToString:@"http"]) {
//starts with http
}
or even easier:
if ([temp hasPrefix:@"http"]) {
//do your stuff
}
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...
How to word wrap text in HTML?
...
It's CSS3, but it works in almost all mainstream browsers, including IE5.5 -> 9 - caniuse.com/#search=word-wrap
– Jon Hadley
Jan 27 '11 at 9:10
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from list of integers, get number closest to a given value
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what about also returning the index that this happened in the list?
– Charlie Parker
Jul 10 '16 at 20:26
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JSTL in JSF2 Facelets… makes sense?
...mponent already ensured the uniqueness of the client ID based on iteration index; it's also not possible to use EL in id attribute of child components this way as it is also evaluated during view build time while #{item} is only available during view render time. Same is true for an h:dataTable and ...
How to dump a table to console?
... pairs(node) do
size = size + 1
end
local cur_index = 1
for k,v in pairs(node) do
if (cache[node] == nil) or (cur_index >= cache[node]) then
if (string.find(output_str,"}",output_str:len())) then
output_str = ou...
How to set size for local image using knitr for markdown?
...is the label of the chunk where the plot has been generated, i is the plot index (within this chunk) and ext is the file extension (by default png in RMarkdown documents).
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
... of the simplest methods. However, you don't need a full lookup table.
//Index 1==0b0001 => 0b1000
//Index 7==0b0111 => 0b1110
//etc
static unsigned char lookup[16] = {
0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf, };
uint8_t reverse(uint8_t n) {
// Reve...