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What are bitwise shift (bit-shift) operators and how do they work?
..., you would use the following math:
memoryOffset = (row * 320) + column
Now, back in that day and age, speed was critical, so we would use bitshifts to do this operation.
However, 320 is not a power of two, so to get around this we have to find out what is a power of two that added together make...
input type=“text” vs input type=“search” in HTML5
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Right now, there isn't a huge deal between them - maybe there never will be.
However, the point is to give the browser-makers the ability to do something special with it, if they want.
Think about <input type="number"> on ce...
Check if an image is loaded (no errors) with jQuery
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The .load() and .error() methods are confusing and now deprecated, use .on() and use the load and error as events.
– Firsh - LetsWP.io
Mar 8 '14 at 20:12
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What is the copy-and-swap idiom?
...rray); // (3)
}
return *this;
}
And we say we're finished; this now manages an array, without leaks. However, it suffers from three problems, marked sequentially in the code as (n).
The first is the self-assignment test. This check serves two purposes: it's an easy way to prevent us fr...
What is this Javascript “require”?
...b browser with a limited global context defined mostly by what came to be known as the Document Object Model (DOM) level 0 (the Netscape Navigator Javascript API).
Server-side Javascript eliminates that restriction and allows Javascript to call into various pieces of native code (like the Postgres ...
What is a race condition?
...read scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data....
JavaScript get clipboard data on paste event (Cross browser)
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The situation has changed since writing this answer: now that Firefox has added support in version 22, all major browsers now support accessing the clipboard data in a paste event. See Nico Burns's answer for an example.
In the past this was not generally possible in a cross-b...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...式如下：
systime()
实例：
$ awk '{ now = systime(); print now }'
strftime函数使用C库中的strftime函数格式化时间。格式如下：
systime( [format specification][,timestamp] )
Table 3. 日期和时间格式说明符
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How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
...me old date-time classes such as java.util.Date and java.sql.Timestamp are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
Dec 24 '18 at 20:01
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Formatting “yesterday's” date in python
... for options, you can as well use Pendulum (pendulum.eustace.io): pendulum.now().subtract(days=-1).strftime('%m%d%y')
– AFD
May 15 '19 at 11:22
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