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How to compare variables to undefined, if I don’t know whether they exist? [duplicate]
...s a string, and doesn't generate an error if the variable doesn't exist at all.
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How to sort an ArrayList?
...t the runtime characteristics of reverse, but sorting descending could actually be faster then sorting ascending and then reversing. Moreover, using a List implementation that supports Comparator as constructor argument (thus keeping it invariant) would ensure the list is sorted at all times.
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Prevent any form of page refresh using jQuery/Javascript
...system tries real hard to do #2, and the situation described above happens all the time. I usually have to wait until the server-side session expires before I can use the banking system again.
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405 method not allowed Web API
This error is very common, and I tried all of the solutions and non of them worked. I have disabled WebDAV publishing in control panel and added this to my web config file:
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How do malloc() and free() work?
I want to know how malloc and free work.
13 Answers
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DISTINCT for only one column
... needs a WHERE condition. I'm thinking the row numbers will be assigned to all rows in the table. This syntax is just a little beyond me. Any chance of an update that would guarantee one row with a particular email that meets the WHERE condition?
– Jonathan Wood
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How to sparsely checkout only one single file from a git repository?
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Originally, I mentioned in 2012 git archive (see Jared Forsyth's answer and Robert Knight's answer), since git1.7.9.5 (March 2012), Paul Brannan's answer:
git archive --format=tar --remote=origin HEAD:path/to/directory -- filename...
Replacement for Google Code Search? [closed]
...- I use it a couple times a week to see how other developers have used (usually poorly documented) APIs. It's also convenient to see the internals of some of those APIs, or to find which API corresponds to the functionality you want (it's a great resource for Android in particular -- give it some o...
Why rgb and not cmy? [closed]
...mary colors are cyan, magenta and yellow (CMY), why do monitors and almost all the GUI components out there use red, green and blue (RGB)? (If I'm not mistaken, printers use the CMYK model.)
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Render a string in HTML and preserve spaces and linebreaks
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you can use css to change the style. i just wrote a really basic example. you can use <pre> tag or use css as per @pete's answer.
– N30
Feb 29 '12 at 2:30
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