console

问题 My C program is pasted below. In bash, the program print "char is ", Ω is not printed. My locale are all en_US.utf8. #include <stdio.h> #include <wchar.h> #include <stdlib.h> int main() { int r; wchar_t myChar1 = L'Ω'; r = wprintf(L"char is %c\n", myChar1); } 回答1: This was quite interesting. Apparently the compiler translates the omega from UTF-8 to UNICODE but somehow the libc messes it up. First of all: the %c -format specifier expects a char (even in the wprintf-version) so you have to

问题 It appeared after migrating project to Swift 4.1 W0423 16:38:46.366578 1 commandlineflags.cc:1503] Ignoring RegisterValidateFunction() for flag pointer 0x10adafe00: no flag found at that address How do I fix it? 回答1: I was helped to roll back to a later version. pod 'GoogleMaps', '~> 2.6.0' for example. 回答2: To provide an Google Maps API key helped for me. 来源： https://stackoverflow.com/questions/49982778/xcode-console-print-weird-error

问题 It appeared after migrating project to Swift 4.1 W0423 16:38:46.366578 1 commandlineflags.cc:1503] Ignoring RegisterValidateFunction() for flag pointer 0x10adafe00: no flag found at that address How do I fix it? 回答1: I was helped to roll back to a later version. pod 'GoogleMaps', '~> 2.6.0' for example. 回答2: To provide an Google Maps API key helped for me. 来源： https://stackoverflow.com/questions/49982778/xcode-console-print-weird-error

问题 Is there a simple built-in way to output formatted data to console in Node.js? Indent, align field to left or right, add leading zeros? 回答1: Two new(1) built in methods String.Prototype.padStart and String.Prototype.padEnd were introduced in ES2017 (ES8) which perform the required padding functions. (1) node >= 8.2.1 (or >= 7.5.0 if run with the --harmony flag) Examples from the mdn page: 'abc'.padStart(10); // " abc" 'abc'.padStart(10, "foo"); // "foofoofabc" 'abc'.padStart(6,"123465"); //

问题 I'm getting a lot of noise from the output of the 3rd party's page i'm currently playing with and i wonder if there's a way to filter the output on the console. Something like Logcat's flags. Is there a way to do that? EDIT I found a way to disable the output that was causing the biggest ammount of noise. I clicked with the right-clicked on the console and then disabled the XMLHttpRequest Logging option. It's not what i wanted, but it's what i needed. 回答1: You can use regular expressions. For

问题 Suppose I want to include some calls to console.log for some legitimate production reason, say for something like a unit test harness. Obviously I would not want this to throw a premature exception if the browser doesn't have a console , or if no console is present. What's the best way to create a simple log function to log stuff to the console, or silently fail without error if no console is present? The accepted answer to the question linked above: var log = Function.prototype.bind.call

问题 Suppose I want to include some calls to console.log for some legitimate production reason, say for something like a unit test harness. Obviously I would not want this to throw a premature exception if the browser doesn't have a console , or if no console is present. What's the best way to create a simple log function to log stuff to the console, or silently fail without error if no console is present? The accepted answer to the question linked above: var log = Function.prototype.bind.call

问题 What is the benefit of using console.log vs console.info ? Or any of the other console commands for that matter? console.info("info"); console.error("error"); console.warn("warn"); vs console.log("log"); I thought it might change the color of the output or concatenate some sort of label, but they seem to all do the same thing. And according to the documentation here: https://nodejs.org/api/console.html#console_console_info_data they seem to all do the same as console.log 回答1: According to the

问题 I tried storing a local image in a rails console. Because I have many pictures in my local storage (I use crawler to download tons of pictures), I want to store them into a database, with the benefit of paperclip to do some image job, like thumbnail etc. If I use a webpage to save new pictures to database one by one, it will cost a lot of time. So I want to find a way in rails console (some code) that can batch save-picture-into-database. 回答1: To further clarify @andrea's answer:

问题 I tried storing a local image in a rails console. Because I have many pictures in my local storage (I use crawler to download tons of pictures), I want to store them into a database, with the benefit of paperclip to do some image job, like thumbnail etc. If I use a webpage to save new pictures to database one by one, it will cost a lot of time. So I want to find a way in rails console (some code) that can batch save-picture-into-database. 回答1: To further clarify @andrea's answer: