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Loop through all the files with a specific extension

I want to loop through each file in the current folder and check if it matches a specific extension. The code above doesn't work, do you know why? ...
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Confusion between numpy, scipy, matplotlib and pylab

...matplotlib, and pylab are common terms among they who use python for scientific computation. 3 Answers ...
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Escaping ampersand in URL

...dy a lot is when you need to put a URL inside of another URL. For example, if you want to post a status on Twitter: http://www.twitter.com/intent/tweet?status=What%27s%20up%2C%20StackOverflow%3F(http%3A%2F%2Fwww.stackoverflow.com) There's lots of reserved characters in my Tweet, namely ?'():/, so...
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Vim: How do you open another [No Name] buffer like the one on startup?

... StackExchange.ifUsing("editor", function () { StackExchange.using("externalEditor", function () { StackExchange.using("snippets", function () { StackExchange.snippets.init(); ...
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Remove all occurrences of char from string

...ent is regular expression, sometimes it won't work as expected, especially if this string comes from user input. – vbezhenar Jul 4 '12 at 8:50 9 ...
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Fill remaining vertical space with CSS using display:flex

...ll grow */ } div { flex: 1; /* 1 and it will fill whole space left if no flex value are set to other children*/ background: gold; overflow: auto; } footer { background: lightgreen; min-height: 60px; /* min-height has its purpose :) , unless you meant height*/ } <section...
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Generating a SHA-256 hash from the Linux command line

... If you have installed openssl, you can use: echo -n "foobar" | openssl dgst -sha256 For other algorithms you can replace -sha256 with -md4, -md5, -ripemd160, -sha, -sha1, -sha224, -sha384, -sha512 or -whirlpool. ...
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Replace Default Null Values Returned From Left Outer Join

... If it is MySQL, IsNull should be replaced with 'IFNULL'. Thanks. – Dhanushka Jul 14 '14 at 6:54 ...
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Why is DarkGray lighter than Gray?

...1 and W3C is the case of "Gray" and its variants. In HTML, "Gray" is specifically reserved for the 128 triplet (50% gray). However, in X11, "gray" was assigned to the 190 triplet (74.5%), which is close to W3C "Silver" at 192 (75.3%), and had "Light Gray" at 211 (83%) and "Dark Gray" at 16...
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Why “decimal” is not a valid attribute parameter type?

...hy is that an attribute must be encoded entirely in metadata. This is different than a method body which is coded in IL. Using MetaData only severely restricts the scope of values that can be used. In the current version of the CLR, metadata values are limited to primitives, null, ty...