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How to decide font color in white or black depending on background color?
...idelines and it looks like the conversion from sRGB to linear RGB followed by the ITU-R recommendation BT.709 for luminance.
for each c in r,g,b:
c = c / 255.0
if c <= 0.03928 then c = c/12.92 else c = ((c+0.055)/1.055) ^ 2.4
L = 0.2126 * r + 0.7152 * g + 0.0722 * b
The threshold of 0....
Get time difference between two dates in seconds
...me() method for the Date objects, and then simply subtract them and divide by 1000 (since it's originally in milliseconds). As an extra, when you're calling the getDate() method, you're in fact getting the day of the month as an integer between 1 and 31 (not zero based) as opposed to the epoch time ...
What is the proper #include for the function 'sleep()'?
...m using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h> under the #include <stdio.h> part. This is...
Advantages of using display:inline-block vs float:left in CSS
...low an element can only be displayed inline-block if it was already inline by default. What this means is that instead of using a <div> element you have to use a <span> element. It's not really a huge drawback at all because semantically a <div> is for dividing the page while a &l...
How can I repeat a character in Bash?
... @mklement0 Well, I was hoping you were counting the last newline by mistake with wc. The only conclusion I can take from this is "seq shouldn't be used".
– Camilo Martin
May 3 '15 at 20:17
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What's the best Django search app? [closed]
...ngo.contrib.search , I have to choose a search app. So, which is the best? By "best" I mean...
15 Answers
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How to delete last character in a string in C#?
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I knew this was in Ruby, had no idea it was in C# and I'm a .net dev. I feel so embarrassed lol
– Jack Marchetti
Feb 5 '13 at 20:31
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Comparing two strings, ignoring case in C# [duplicate]
...LowerCase be a better option if comparing a lot against the same string ? By doing this, you'll have to 'tolower' the other string each time, which can be expensive.
– Frederik Gheysels
Jun 24 '15 at 13:45
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Git, fatal: The remote end hung up unexpectedly
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Thanks for the link - I sorted the issue by splitting the push into smaller chunks. If I have a problem again I know where to look!
– jowie
Sep 30 '13 at 8:13
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JavaScript checking for null vs. undefined and difference between == and ===
...and `""`, and `0`, and `NaN`, and [of course] `false`)
}
This is defined by ToBoolean in the spec.
...and what is the difference between the null and undefined?
They're both values usually used to indicate the absence of something. undefined is the more generic one, used as the default value...