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mkdir's “-p” option
...r fingertips: man mkdir yields this about -p switch:
-p, --parents
no error if existing, make parent directories as needed
Use case example: Assume I want to create directories hello/goodbye but none exist:
$mkdir hello/goodbye
mkdir:cannot create directory 'hello/goodbye': No such file or d...
How to make --no-ri --no-rdoc the default for gem install?
...d Ruby that I copied & pasted at some point and then resulted in psych errors while installing RubyGems 1.8.10 under Ruby 1.9.2.
– stevenhaddox
Sep 3 '11 at 15:02
17
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How to update gradle in android studio?
... With all these steps: Gradle 'Project' project refrash failed. Error: Cause: ....../gradle-3.0.0-all.zip
– rommex
Dec 6 '17 at 7:46
...
How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
...h this solution is that if the table already contains rows then you get an error: SQL Error [23502]: ERROR: column "id" contains null values
– isapir
Mar 7 '18 at 16:30
3
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What is the Scala annotation to ensure a tail recursive function is optimized?
...eption("bang!")
| else bang(x-1)
| }
| }
<console>:9: error: could not optimize @tailrec annotated method: it contains a recursive call not in tail position
@tailrec def boom(x: Int): Int = {
^
<console>:13: error: could not optimize @tailrec ann...
How to prevent rm from reporting that a file was not found?
...delete many files. Sometimes the files are not present, so it reports many errors. I do not need this message. I have searched the man page for a command to make rm quiet, but the only option I found is -f , which from the description, "ignore nonexistent files, never prompt", seems to be the rig...
Get the latest record from mongodb collection
...
For anyone using AWS DocDB: Query failed with error code 303 and error message 'option $natural is not supported' on server docdb. Hopefully that feature comes soon.
– Marc
Apr 12 '19 at 18:58
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Form inline inside a form horizontal in twitter bootstrap?
...w naam" value="{--NAAM--}" >
<div id="naamx" class="form-error form-hidden">Wat is uw naam?</div>
</div>
</div>
<div class="form-row">
<div class="form-group col-5">
<label class="control-label col-sm-4" for=...
Do interfaces inherit from Object class in java
...reover you can cast interface to an Object implicitly without any compiler error.
– nme
Feb 10 '19 at 14:03
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Why do I get a warning icon when I add a reference to an MEF plugin project?
...
not even any hover text or build errors explaining what the issue is
– matao
Sep 4 '17 at 0:06
7
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