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Understanding promises in Node.js
...s was that they were emitters that could emit only two events: success and error.
The cool thing about promises is you can combine them into dependency chains (do Promise C only when Promise A and Promise B complete).
By removing them from the core node.js, it created possibility of building up mo...
Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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汇编常用寄存器及指令基础总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...寄存器及指令基础总结8086汇编常用寄存器数据寄存器AH&AL=AX：累加寄存器，常用于运算BH&BL=BX：基址寄存器，常用于地址索引CH&CL=CX：计数寄存器，常用于计数DH...8086汇编常用寄存器
数据寄存器
AH&AL=AX：累加寄存器，常用于运...
Print second last column/field in awk
I want to print the second last column or field in awk. The number of fields is variable. I know that I should be able to use $NF but not sure how it can be used.
...
How to make remote REST call inside Node.js? any CURL?
...r request = require('request');
request('http://www.google.com', function (error, response, body) {
if (!error && response.statusCode == 200) {
console.log(body) // Print the google web page.
}
})
OP also wanted a POST:
request.post('http://service.com/upload', {form:{key...
Error to use a section registered as allowDefinition='MachineToApplication' beyond application level
The top line in all of my aspx pages in my /portal/ directory has this error message, and I know it's a common one. I have googled this error message to no end, and I see a lot of posts telling me to configure the /portal/ folder as an application in IIS (which I have), and more posts telling me I ...
Which timestamp type should I choose in a PostgreSQL database?
..._Angeles';
SET
test=> INSERT INTO my_tbl (my_timestamp) VALUES (NOW());
ERROR: new row for relation "my_tbl" violates check constraint "my_tbl_my_timestamp_check"
test=> SET timezone = 'UTC';
SET
test=> INSERT INTO my_tbl (my_timestamp) VALUES (NOW());
INSERT 0 1
It's not 100% perfect, b...
How to find the statistical mode?
...rsion 3.6.0, it says function 'could not find function "mlv"' and the same error when I tried mfv(mysamples). Is it depreciated?
– Dr Nisha Arora
Oct 18 '19 at 17:00
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Can a Byte[] Array be written to a file in C#?
I'm trying to write out a Byte[] array representing a complete file to a file.
8 Answers
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Filtering Pandas DataFrames on dates
...
I recieve the following error using this: TypeError: '<' not supported between instances of 'int' and 'datetime.date'
– Haris Khaliq
Aug 28 '18 at 17:43
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