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How to get the number of characters in a std::string?
...s). If you're doing that, you're not going to get much help with anything from the std library, so you can handle rolling your own strlen as well. For wstring, u16string and u32string, it returns the number of characters, rather than bytes. (Again with the proviso that if you are using a variable...
Can we omit parentheses when creating an object using the “new” operator?
...he examples on developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/… , from "the guys who invented the <expletive> language" don't use any parentheses on new Class for parameterless constructors. If this doesn't spell 'opinionated', I don't know what does...
– ack
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matplotlib does not show my drawings although I call pyplot.show()
...python 2.7, which created a ~/.matplotlib/ directory, and stopped python 3 from reading the config in ~/.config/matplotlib/. Deleting ~/.matplotlib/ fixed the problem for me.
– naught101
Nov 11 '13 at 23:50
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(13: Permission denied) while connecting to upstream:[nginx]
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This worked, thanks. I updated from CentOS 6.5 -> 6.7 and it must have defaulted the value to off during the update, because it was working fine before the update. Simple fix.
– Mike Purcell
Oct 6 '15 at 14:04
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How can I mix LaTeX in with Markdown? [closed]
...5 I'd switch to recommend KaTeX - most performant Javascript LaTeX library from Khan Academy.
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How can I check if an argument is defined when starting/calling a batch file?
...e:
echo "%1"
if ("%1"=="") echo match1
if "%1"=="" echo match2
Output from running above script:
C:\>echo ""
""
C:\>if ("" == "") echo match1
C:\>if "" == "" echo match2
match2
I think it is actually taking the parentheses to be part of the strings and they are being compared.
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POST data with request module on Node.JS
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Aside from the errors in the json string, this one did the trick for me! Note that the "form" section has an object passed to it, so you could just define everything in there as an object to begin with and not do that prep work
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Changing navigation title programmatically
...s to the class itself. You need to refer to an instance of ViewController. From within a method on your class, such as viewDidLoad, you can do so using self. If you do not know the difference between a class and an instance, I highly recommend you learn what it is. This article will help.
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Getting the difference between two repositories
...known revision or path not in the working tree. Use '--' to separate paths from revisions, like this: 'git <command> [<revision>...] -- [<file>...]' Any ideas here?
– Andrew Heekin
Sep 2 '15 at 3:09
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Adding a new SQL column with a default value
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Try this:
ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0;
From the documentation that you linked to:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
alter_specification [, alter_specification] ...
alter_specification:
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ADD [COLUMN] (col_name column_definition,...)
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