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Multiline comment in PowerShell
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In PowerShell v2 and newer, use the following syntax for the multiline comments:
<# a
b
c #>
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How to add multiple columns to a table in Postgres?
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and to set the default value: ALTER TABLE table ADD COLUMN col1 int default 0, ADD COLUMN col2 text default 'foo';
– Brian D
Feb 11 at 15:36
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Is JavaScript guaranteed to be single-threaded?
...aded in all modern browser implementations, but is that specified in any standard or is it just by tradition? Is it totally safe to assume that JavaScript is always single-threaded?
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Why doesn't Java Map extend Collection?
...tion?
This was by design. We feel that
mappings are not collections and
collections are not mappings. Thus, it
makes little sense for Map to extend
the Collection interface (or vice
versa).
If a Map is a Collection, what are the
elements? The only reasonable answer
is "Key-va...
Sass negative variable value?
I have a couple of scss selectors where I use the same amount positive and negative, as in:
3 Answers
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How to tell git to ignore individual lines, i.e. gitignore for specific lines of code [duplicate]
...se problems, but I'll try implementing it some other time.
Thanks to Rudi and jw013 for mentioning git filters and gitattributes.
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A non well formed numeric value encountered
I have a form that passes two dates (start and finish) to a PHP script that will add those to a DB. I am having problems validating this. I keep getting the following errors
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AI助手能力再进化：“手术级”修改代码块 - AI 助手 - 清泛IT社区，为创新赋能！
...sp; {"while":{"and":[
{"and":[{"gte":[{"get_var": "r"},1]},{"lte":[{"get_var": "r"},15]}]},
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Managing constructors with many parameters in Java
...e("Spicoli")
.age(16)
.motto("Aloha, Mr Hand")
.buildStudent();
If we leave off a required field (presumably name is required) then we can have the Student constructor throw an exception.
And it lets us have default/optional arguments without need...
How to run Ruby code from terminal?
...o start the interactive Ruby environment, where you can type lines of code and see the results immediately.
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