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What does “dereferencing” a pointer mean?
...ointer points to - the contents of the address with that numerical index - then you dereference the pointer.
Different computer languages have different notations to tell the compiler or interpreter that you're now interested in the pointed-to object's (current) value - I focus below on C and C++.
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Why would one omit the close tag?
...nclude scripts, rendering any ?> with trailing whitespace noneffective.
Then there are all kinds of soft / faux close tag variations; lesser known and seldomly used, but usually per commented-out tokens:
Simple spacing // ? > to evade detection by PHPs tokenizer.
Or fancy Unicode substitutes...
Ignoring directories in Git repositories on Windows
...ash command prompt and that will create the correctly named file which can then in turn be edited by notepad or the like...
– SGB
Nov 22 '11 at 21:48
39
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Reorder / reset auto increment primary key
...You could drop the primary key column and re-create it. All the ids should then be reassigned in order.
However this is probably a bad idea in most situations. If you have other tables that have foreign keys to this table then it will definitely not work.
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Random number generator only generating one random number
...dom
= new ThreadLocal<Random>(() => new Random());
this is then per-thread, so you don't need to synchronize.
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Show/hide 'div' using JavaScript
For a website I'm doing, I want to load one div, and hide another, then have two buttons that will toggle views between the div using JavaScript.
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Strings in a DataFrame, but dtype is object
...er to fetch the 3rd element in the array, it'll start at the beginning and then jump across 64 bits to get to the 3rd element. Knowing exactly how many bits to jump across is what makes arrays fast.
Now consider the sequence of strings ['hello', 'i', 'am', 'a', 'banana']. Strings are objects that va...
How to fade to display: inline-block
...seconds, right after calling the fadeIn, it has inline-block in its style, then style is set to block. with Simon suggestion the effect is not nice, as during the fadeIn the element is displayed as block
– Giox
Nov 7 '16 at 16:40
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Textarea to resize based on content length [duplicate]
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You can check the content's height by setting to 1px and then reading the scrollHeight property:
function textAreaAdjust(element) {
element.style.height = "1px";
element.style.height = (25+element.scrollHeight)+"px";
}
<textarea onkeyup="textAreaAdjust(this)" style="ove...
Git for Windows: .bashrc or equivalent configuration files for Git Bash shell
...oes not exist, create it with the following content:
if [ -f ~/.bashrc ]; then . ~/.bashrc; fi
This will cause Bash to read the .bashrc file. From my understanding of this issue, Git for Windows should do this automatically. However, I just installed version 2.5.1, and it did not.
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