Because 

    [A-z0-9]+ 
     ↑ ↑ 


is from `A` to `z`, see the ASCII table, `]` appears between the two characters:

![enter image description here][1]


  [1]: http://i.stack.imgur.com/zgRxj.png

    A===&gt;64
    z===&gt;122
    [===&gt;91


So it is in between the range you have defined.Use `[A-Za-z0-9]+`

You can use `/[a-z0-9]+/i` (the `i` makes it case-insensitive),  or `/[A-Za-z0-9]+/`.

When TalkBack is enabled, is there any way to set the accessibility focus manual to a specific view? For instance, when my Activity is started I want TalkBack to automatically focus on a certain Button (yellow frame around the view) and read its content description.

What I&#39;ve tried so far:

        myButton.setFocusable(true);
        myButton.setFocusableInTouchMode(true);
        myButton.requestFocus();

requestFocus(), it seems, is only requesting input focus and has nothing to do with accessibility focus. I&#39;ve also tried:

        myButton.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED);
        myButton.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED);
        myButton.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
        myButton.announceForAccessibility(&quot;accessibility test&quot;);
        myButton.performAccessibilityAction(64, null); // Equivalent to ACTION_ACCESSIBILITY_FOCUS

        AccessibilityManager manager = (AccessibilityManager) getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (manager.isEnabled()) {
            AccessibilityEvent e = AccessibilityEvent.obtain();
            e.setSource(myButton);
            e.setEventType(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED);
            e.setClassName(getClass().getName());
            e.setPackageName(getPackageName());
            e.getText().add(&quot;another accessibility test&quot;);
            manager.sendAccessibilityEvent(e);
        }

None of this seems to work.

Android - Set TalkBack accessibility focus to a specific view

We&#39;ve been long-time fans of `pylint`. Its static analysis has become a critical part of all our python projects and has saved tons of time chasing obscure bugs.  But after upgrading from 1.3 -&gt; 1.4, almost all compiled c extensions result in E1101(no-member) errors.  

Projects that previously run perfectly clean through `pylint` 1.3 now complain about almost every C extension member with E1101. We&#39;ve been forced to disable E1101 errors, but this materially detracts from the usefulness of `pylint`.

For example, this perfectly valid use of the `lxml` package

    r&quot;&quot;&quot;valid.py: demonstrate pylint 1.4 error&quot;&quot;&quot;
    from lxml import etree
    print etree.Element(&#39;mydoc&#39;)

Run this through `pylint`, and it reports:

    $ pylint -rn valid.py
    No config file found, using default configuration
    ************* Module valid
    E:  3, 6: Module &#39;lxml.etree&#39; has no &#39;Element&#39; member (no-member)

But it is perfectly valid:

    $ python valid.py
    &lt;Element mydoc at 7fddf67b1ba8&gt;

Here&#39;s where it gets really weird. A very small handful of C extensions seem to work just fine through `pylint`, e.g.:

    r&quot;&quot;&quot;valid2.py: this one works fine&quot;&quot;&quot;
    import sqlite3
    print sqlite3.version

    $ pylint -rn valid2.py
    No config file found, using default configuration
 
My question is, has anyone else witnessed this? And if so, would you be willing to share your workaround/solution?

We&#39;ve experimented with trying to create plugins to suppress these warnings
(http://docs.pylint.org/plugins.html#enter-plugin), but we&#39;re having difficulty making heads or tails of the docs -- and the `astroid` base class is uber-complex and has defied our attempts to grok it.

For real bonus points (and our eternal gratitude) we&#39;d love to understand what changed in `pylint`.  We&#39;d be happy to fix the code (or at least publish a best practice document for C extension authors) that would satisfy `pylint`. 

Platform details

    $ pylint --version
    No config file found, using default configuration
    pylint 1.4.0,
    astroid 1.3.2, common 0.63.2
    Python 2.7.5 (default, Jul  1 2013, 18:09:11)
    [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]



pylint 1.4 reports E1101(no-member) on all C extensions

I&#39;m struggling with the following regexp

    [A-z0-9]+

If tested against this string:

    ||a919238[.--a]asd|

it returns `a919238[`, including the square bracket.. I tried to input [my test case on regex101][1] to understand what&#39;s wrong, but the site regex explanation is not helping, probably I&#39;m not able to see my mistake.

Why is the square bracket included in the result?

  [1]: https://www.regex101.com/r/lE6cR8/2

[A-z0-9]+ regexp matching square brackets

I'm struggling with the following regexp
<pre><code class="hljs language-csharp">[A-z0-9]+
</code></pre>
If tested against this string:
<pre><code class="hljs language-css">||a919238[.--a]asd|
</code></pre>
it returns <code>a919238[</code>, including the square bracket.. I tried to input <a href="https://www.regex101.com/r/lE6cR8/2" target="_blank" rel="noopener noreferrer">my test case on regex101</a> to understand what's wrong, but the site regex explanation is not helping, probably I'm not able to see my mistake.
Why is the square bracket included in the result?

I want to know a regex to match the  Egyptian Hieroglyphics. I am completely clueless and need your help.

I cannot post the letters as stack overflow doesnt seem to recognize it.
 
So can anyone let me know the unicode range for these characters.


Regex to match Egyptian Hieroglyphics

I want to select multiple columns based on their names with a *regex* expression. I am trying to do it with the piping syntax of the `dplyr` package. I checked the other topics, but only found answers about a single string.

With base R:

    library(dplyr)    
    mtcars[grepl(&#39;m|ar&#39;, names(mtcars))]
    ###                      mpg am gear carb
    ### Mazda RX4           21.0  1    4    4
    ### Mazda RX4 Wag       21.0  1    4    4

However it doesn&#39;t work with the select/contains way:

    mtcars %&gt;% select(contains(&#39;m|ar&#39;))
    ### data frame with 0 columns and 32 rows

What&#39;s wrong?


select columns based on multiple strings with dplyr contains()

I&#39;m wondering whether it is possible to write a 100% reliable `sed` command to escape any regex metacharacters in an input string so that it can be used in a subsequent sed command. Like this:

    #!/bin/bash
    # Trying to replace one regex by another in an input file with sed

    search=&quot;/abc\n\t[a-z]\+$[^ ]$\{2,3\}\3&quot;
    replace=&quot;/xyz\n\t[0-9]\+$[^ ]$\{2,3\}\3&quot;

    # Sanitize input
    search=$(sed &#39;script to escape&#39; &lt;&lt;&lt; &quot;$search&quot;)
    replace=$(sed &#39;script to escape&#39; &lt;&lt;&lt; &quot;$replace&quot;)

    # Use it in a sed command
    sed &quot;s/$search/$replace/&quot; input

I know that there are better tools to work with fixed strings instead of patterns, for example `awk`, `perl` or `python`. I would just like to prove whether it is possible or not with `sed`. I would say let&#39;s concentrate on basic POSIX regexes to have even more fun! :)

I have tried a lot of things but anytime I could find an input which broke my attempt. I thought keeping it abstract as `script to escape` would not lead anybody into the wrong direction.

Btw, the discussion came up [here][1]. I thought this could be a good place to collect solutions and probably break and/or elaborate them.


  [1]: https://stackoverflow.com/questions/29606527/sed-replace-multiple-patterns-but-not-with-the-same-string/29609706?noredirect=1#comment47365660_29609706

Is it possible to escape regex metacharacters reliably with sed

I want Regular Expression to accept only **Arabic characters**, **Spaces** and **Numbers**.

Numbers are not required to be in Arabic.

I found the following expression:

    ^[\u0621-\u064A]+$

which accepts only only Arabic characters while I need Arabic characters, Spaces and Numbers.

Regular Expression Arabic characters and numbers only

http://regexr.com/3ars8

    ^(?=.*[0-9])(?=.*[A-z])[0-9A-z-]{17}$

Should match &quot;17 alphanumeric chars, hyphens allowed too, must include at least one letter and at least one number&quot;

It&#39;ll correctly match:

    ABCDF31U100027743

and correctly decline to match:

    AB$DF31U100027743

(and almost any other non-alphanumeric char)

but will apparently allow:

    AB^DF31U100027743



Content Type	Original Author	Original Content on Stackoverflow
Question	BeNdErR	View Question on Stackoverflow
Solution 1 - Regex	Maroun	View Answer on Stackoverflow
Solution 2 - Regex	vks	View Answer on Stackoverflow
Solution 3 - Regex	Ahosan Karim Asik	View Answer on Stackoverflow

[A-z0-9]+ regexp matching square brackets

Regex Problem Overview

Regex Solutions

Solution 1 - Regex

Solution 2 - Regex

Solution 3 - Regex

pylint 1.4 reports E1101(no-member) on all C extensions

Android - Set TalkBack accessibility focus to a specific view

Attributions