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How many and which are the uses of “const” in C++?
...y obscure to me, one of these is const . You can use it in so many places and with so many different effects that is nearly impossible for a beginner to come out alive. Will some C++ guru explain once forever the various uses and whether and/or why not to use them?
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Why don't structs support inheritance?
...rt inheritance is because of arrays.
The problem is that, for performance and GC reasons, arrays of value types are stored "inline". For example, given new FooType[10] {...}, if FooType is a reference type, 11 objects will be created on the managed heap (one for the array, and 10 for each type ins...
Is Javascript a Functional Programming Language?
Just because functions are first class objects, there are closures, and higher order functions, does Javascript deserve to be called a Functional Programming language? The main thing I think it lacks is Pure Functions, and it doesn't 'feel' like other functional languages, like lisp (although thats...
How do you detect the clearing of a “search” HTML5 input?
... when the user clicks the "x". This is especially useful because it understands the "incremental" attribute.
Now, having said that, I'm not sure if you can tell the difference between clicking the "x" and searching, unless you use an "onclick" hack. Either way, hopefully this helps.
References:
htt...
Replace whitespaces with tabs in linux
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Use the unexpand(1) program
UNEXPAND(1) User Commands UNEXPAND(1)
NAME
unexpand - convert spaces to tabs
SYNOPSIS
unexpand [OPTION]... [FILE]...
DESCRIPTION
Convert blan...
Chrome Development Tool: [VM] file from javascript
I added a breakpoint in my javascript file (jaydata.js) and was pressing "Step over to the next function call."
When it got to a line that was:
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Login to Microsoft SQL Server Error: 18456
...rver Management Studio in the object explorer:
Right click on the server and click Properties
Go to the Security page
Under Server authentication choose the SQL Server and Windows Authentication mode radio button
Click OK
Restart SQL Services
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Named routes _path vs _url
...st of the time.
_url helpers provide an absolute path, including protocol and server name. I've found that I mainly use these in emails when creating links to the app on the server. They should mainly be used when providing links for external use. (Think email links, RSS, and things like the copy a...
Padding characters in printf
...=60
pad=$(printf '%*s' "$padlimit")
pad=${pad// /-}
So the pad (padlimit and padlength) could be based on terminal width ($COLUMNS) or computed from the length of the longest data string.
Output:
a--------------------------------bbbbbbb
aa--------------------------------bbbbbb
aaaa--------------...
Include headers when using SELECT INTO OUTFILE?
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See a few answers below for ideas on using ORDER BY and also matt's answer for a way to quickly get all the ColName1, ColName2, etc. Very useful add-ons to this great answer!
– Andrew T
Oct 5 '15 at 1:11
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