Tutorial by Examples: pre

git log --pretty=format:"%Cgreen%ci %Cblue%cn %Cgreen%cr%Creset %s" This will give a nice overview of all commits (1 per line) with date, user and commit message. The --pretty option has many placeholders, each starting with %. All options can be found here

Python follows PEMDAS rule. PEMDAS stands for Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction. Example: >>> a, b, c, d = 2, 3, 5, 7 >>> a ** (b + c) # parentheses 256 >>> a * b ** c # exponent: same as `a * (b ** c)` 7776 >>...

The HTTP message body can be compressed (since HTTP/1.1). Either by the server compresses the request and adds a Content-Encoding header, or by a proxy does and adds a Transfer-Encoding header. A client may send an Accept-Encoding request header to indicate which encodings it accepts. The most com...

It is possible to compress an HTTP response message body more than once. The encoding names should then be separated by a comma in the order in which they were applied. For example, if a message has been compressed via deflate and then gzip, the header should look like: Content-Encoding: deflate, g...

The client first sends a request with an Accept-Encoding header that indicates it supports gzip: GET / HTTP/1.1\r\n Host: www.google.com\r\n Accept-Encoding: gzip, deflate\r\n \r\n The server may then send a response with a compressed response body and a Content-Encoding header that specifies...

To build up an expression like _ => _.Field == "VALUE" at runtime. Given a predicate _ => _.Field and a string value "VALUE", create an expression that tests whether or not the predicate is true. The expression is suitable for: IQueryable<T>, IEnumerable<T>...

This creates a simple archive of a folder : tar -cf ./my-archive.tar ./my-folder/ Verbose output shows which files and directories are added to the archive, use the -v option: tar -cvf ./my-archive.tar ./my-folder/ For archiving a folder compressed 'gzip', you have to use the -z option : ta...

Description: Evaluate expression after user's confirmation. Arguments: ng-confirm-click:(expression) Expression to evaluate when confirmed. ng-confirm-message:(template) Message to be shown in confirm dialog. Code: Directives.directive("ngConfirmClick", ["$parse","...

# operator or stringizing operator is used to convert a Macro parameter to a string literal. It can only be used with the Macros having arguments. // preprocessor will convert the parameter x to the string literal x #define PRINT(x) printf(#x "\n") PRINT(This line will be converted to...

For more advanced regex operations it's best to use CL_ABAP_REGEX and its related classes. DATA: lv_test TYPE string, lo_regex TYPE REF TO cl_abap_regex. lv_test = 'The quick brown fox'. CREATE OBJECT lo_regex EXPORTING pattern = 'q(...)\w'. DATA(lo_matcher) = lo_regex->cr...

To preload remote images and ensure that the image is only downloaded once: Glide.with(context) .load(yourUrl) .diskCacheStrategy(DiskCacheStrategy.SOURCE) .preload(); Then: Glide.with(context) .load(yourUrl) .diskCacheStrategy(DiskCacheStrategy.SOURCE) // ALL works her...

It's good practice to mark some warnings in your code. For example, some deprecated methods is need for your testing, or old support version. But Lint checking will mark that code with warnings. For avoiding this problem, you need use annotation @SuppressWarnings. For example, add ignoring to warni...

Exec sp_configure 'backup compression default',1 GO RECONFIGURE;

It is convenient to set custom conditional preprocessing at project level when some actions need to be skipped lets say for tests. Go to Solution Explorer -> Click Right Mouse on project you want to set variable to -> Properties -> Build -> In General find field Conditional compilation ...

If you want to extract a folder, but you want to exclude one or several folders during the extraction, you can use the --exclude option. tar -cf archive.tar ./my-folder/ --exclude="my-folder/sub1" --exclude="my-folder/sub3" With this folder tree : my-folder/ sub1/ su...

Setup Espresso : androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2' androidTestCompile 'com.android.support.test:runner:0.5' ViewMatchers – A collection of objects that implement Matcher<? super View> interface. You can pass one or more of these to the onView met...

var path = "/test_javascript_upload.txt"; var content = "data to upload"; var accessToken = "<ACCESS_TOKEN>"; var uploadUrl = "https://content.dropboxapi.com/2/files/upload" var result; var xhr = new XMLHttpRequest(); xhr.onreadystatechange = fun...

Often you want to match an expression only in specific places (leaving them untouched in others, that is). Consider the following sentence: An apple a day keeps the doctor away (I eat an apple everyday). Here the "apple" occurs twice which can be solved with so called backtracking cont...

The result of a reinterpret_cast from one function pointer type to another, or one function reference type to another, is unspecified. Example: int f(); auto fp = reinterpret_cast<int(*)(int)>(&f); // fp has unspecified value C++03 The result of a reinterpret_cast from one object poi...

Function calls as f(a) always imply a sequence point between the evaluation of the arguments and the designator (here f and a) and the actual call. If two such calls are unsequenced, the two function calls are indeterminately sequenced, that is, one is executed before the other, and order is unspeci...